orcas attacking yachts off spanish coast

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Killer whales are 'attacking' sailboats near Europe's coast. Scientists don't know why

Scott Neuman

An orca pod seen in the Strait of Gibraltar in 2021. Renaud de Stephanis/CIRCE Conservación Information and Research hide caption

An orca pod seen in the Strait of Gibraltar in 2021.

Ester Kristine Storkson was asleep on her father's small yacht earlier this month, sailing off the coast of France, when she was violently awakened.

Scrambling on deck, she spotted several orcas, or killer whales, surrounding them. The steering wheel swung wildly. At one point, the 37-foot sailboat was pushed through 180 degrees, heading it in the opposite direction.

They were "ramming the boat," Storkson says. "They [hit] us repeatedly ... giving us the impression that it was a coordinated attack."

"I told my dad, 'I'm not thinking clearly, so you need to think for me,'" the 27-year-old Norwegian medical student says. "Thankfully, he is a very calm and centered person, and made me feel safe by gently talking about the situation."

After about 15 minutes, the orcas broke off, leaving father and daughter to assess the damage. They stuck a GoPro camera in the water, she says, and could see that "approximately three-quarters of [the rudder] was broken off, and some metal was bent."

A screen grab from a video of the encounter between a pod of orcas and the Storkson boat. Ester Kristine Storkson hide caption

A screen grab from a video of the encounter between a pod of orcas and the Storkson boat.

For any vessel, losing steering at sea is a serious matter and can be dangerous in adverse conditions and some sailboats have had to be towed into port after orcas destroyed their rudders. Fortunately, the Storksons had enough of their rudder left to limp into Brest, on the French coast, for repairs. But the incident temporarily derailed their plan to reach Madeira, off northwest Africa, part of an ambitious plan to sail around the world.

There is no record of an orca killing a human in the wild. Still, two boats were reportedly sunk by orcas off the coast of Portugal last month, in the worst such encounter since authorities have tracked them.

The incident involving the Storksons is an outlier, says Renaud de Stephanis, president and coordinator at CIRCE Conservación Information and Research, a cetacean research group based in Spain. It was farther north -- nowhere near the Strait of Gibraltar, nor the coast of Portugal or Spain, where other such reports have originated.

That is a conundrum. Up to now, scientists have assumed that only a few animals are involved in these encounters and that they are all from the same pod, de Stephanis says.

"I really don't understand what happened there," he acknowledges. "It's too far away. I mean, I don't think that [the orcas] would go up there for a couple of days and then come back."

These encounters — most scientists shun the word "attack" — have been getting the attention of sailors and scientists alike in the past two years, as their frequency seems to be increasing. Sailing magazines and websites have written about the phenomenon, noting that orcas seem to be especially attracted to a boat's rudder. A Facebook group , with more than 13,000 members, has sprung up to trade personal reports of boat-orca encounters and speculation on avoidance tactics. And, of course, there are no shortage of dramatic videos posted to YouTube.

Scientists don't know the reason, but they have some ideas

Scientists hypothesize that orcas like the water pressure produced by a boat's propeller. "What we think is that they're asking to have the propeller in the face," de Stephanis says. So, when they encounter a sailboat that isn't running its engine, "they get kind of frustrated and that's why they break the rudder."

Even so, that doesn't entirely explain an experience Martin Evans had last June when he was helping to deliver a sailboat from Ramsgate, England, to Greece.

About 25 miles off the coast of Spain, "just shy of entering the Strait of Gibraltar," Evans and his crew mates were under sail, but they were also running the boat's engine with the propeller being used to boost their speed.

As Evans was on watch, the steering wheel began moving so violently that he couldn't hold on, he says.

"I was like, 'Jesus, what's this?'" he recalls. "It was like a bus was moving it. ... I look to the side, and all of a sudden I could just see that familiar white and black of the killer whale."

Evans noticed "chunks of the rudder on the surface."

Jared Towers, the director of Bay Cetology, a research organization in British Columbia, says "there's something about moving parts ... that seem to stimulate them."

"Perhaps that's why they're focused on the rudders," he says.

The population of orcas along the Spanish and Portuguese coasts is small and de Stephanis believes that the damage to boats is being done by just a few juvenile males.

If so, they may simply outgrow the behavior, de Stephanis says. As the young males get older, they will need to help the pod hunt for food and will have less time for playing with sailboats.

"This is a game," he speculates. "When they ... have their own adult life, it will probably stop."

An orca calf, photographed in the Strait of Gibraltar, in 2021. Renaud de Stephanis/CIRCE Conservación Information and Research hide caption

An orca calf, photographed in the Strait of Gibraltar, in 2021.

Towers says such "games" tend to go in and out of fashion in orca society. For example, right now in a population he studies in the Pacific, "we have juvenile males who ... often interact with prawn and crab traps," he says. "That's just been a fad for a few years."

Back in the 1990s, for some orcas in the Pacific, something else was in vogue. "They'd kill fish and just swim around with this fish on their head," Towers says. "We just don't see that anymore."

Orcas are ramming boats off the Spanish coast, puzzling experts

24 incidents so far this year, spain's maritime rescue service says.

Aggressive killer whales damage boat off coast of southern Spain

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A pod of orcas repeatedly rammed a yacht in the Strait of Gibraltar this week, damaging it enough to require Spanish rescuers to come to the aid of its four crew members.

It was the latest episode in a perplexing trend in the behaviour of orcas populating the Atlantic coast of the Iberian Peninsula that has left researchers searching for a cause.

Spain's Maritime Rescue service said that orcas repeatedly ran into the Mustique, a 20-metre vessel sailing under a U.K. flag, late on Wednesday, rendering its rudder inoperative and cracking its hull. Rescuers needed to pump out seawater before towing her to safety.

The alert reached the Spanish service via their British counterparts, who relayed the distress call, the Spanish service said. A helicopter and a rescue boat were deployed to help the damaged boat to dock in Barbate.

This was the 24th such incident registered by the service this year. The service didn't provide data from last year.

But the Atlantic Orca Working Group, a team of Spanish and Portuguese marine life researchers who study orcas near the Iberian Peninsula, says such incidents were first reported three years ago. In 2020, the group registered 52 such events, some of which resulted in damaged rudders. That increased to 197 in 2021 and to 207 in 2022.

The orcas seem to be targeting boats in a wide arc covering the western coast of the peninsula, from the waters near the Strait of Gibraltar to Spain's northwestern Galicia.

• Inbreeding is hampering population growth for orcas, study finds

According to the group, these orcas are a small group of about 35 that spend most of the year near the Iberian coast in pursuit of red tuna. The so-called Iberian orcas average from five to 6.5 metres in length, compared to the orcas of Antarctica which can reach nine metres.

There have been no reports of attacks against swimmers. The interactions on boats seem to stop once the vessel becomes immobilized.

Biologist Alfredo Lopez, of the University of Aveiro and member of the research group, said that the incidents are rare — and enticingly odd.

"In none of the cases that we have been able to see on video have we witnessed any behaviour that could be considered aggressive," Lopez told The Associated Press by phone on Friday. "They appear calm, nothing at all like when they are on the hunt."

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Lopez said that while the cause of the behaviour is unknown, his group has identified 15 individual whales that have been involved. He said that 13 are young whales, which could support the hypothesis that they are playing, while two are adults, which could support a competing theory that the behaviour is the result of some traumatic event with a boat.

In either case, he said the whales are showing once again that they are social animals.

"Orcas are animals with their own culture," he said. "They transmit information to one another."

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Scientists Have a New Theory About Why Orcas Are Attacking Boats

A pod of orcas damaged a boat and left its two-person crew stranded. It was the latest in a string of attacks that research suggests could be used for hunting practice.

By Lynsey Chutel

Reporting from London

The orcas have struck again — this time ramming a sailboat off Spain’s northwest coast, rescue workers said on Tuesday.

A pod of orcas damaged the rudder of a sailboat, leaving its two-person crew stranded in the waters off Cape Finisterre Sunday, according to an emailed statement from the rescue workers. It is the latest in a string of attacks by pods of orcas swimming around the Iberian Peninsula.

While the sailboat, the Amidala, did not sink, pods of orcas have sunk several vessels in recent years. Researchers still do not know whether the attacks are playful or malicious, but a new theory based on studying the troublesome pods of orcas suggests that they could be using the boats as practice targets for new hunting techniques. Other competing theories still exist.

Regardless of the orcas’ intentions, the behavior is enough to worry sailors journeying in the highly trafficked waters around North Africa, Spain and Portugal.

The Amidala, manned by a crew of two Belgians, encountered an unknown number of orcas on Sunday afternoon. They sent a mayday distress call to the Finisterre Maritime Rescue Center, which towed the vessel back to shore, the center said.

The sailboat’s damaged rudder, and poor weather conditions in the area, made the rescue more arduous, with waves reaching up to nearly 10 feet and winds hitting speeds of 40 miles per hour. A female crew member on the Amidala suffered injuries to her hand as the sailboat was being towed, and she was transferred to a rescue vessel, the rescue center said. After more than four hours, the Amidala made it back to shore.

In recent years, sailors have shared tips about how to stop orca rammings, or at the very least deter them. Deterrents include painting the hull a different color. Another tactic is to blast heavy metal music, or to scatter sand into the ocean. There’s also an app that tracks orca activity in the ocean, letting boats steer clear of pods.

Researchers have no definitive explanations about why orcas, seemingly in this region alone, are increasingly ramming ships. One theory suggests that the ramming stems from past traumatic encounters between orcas and boats. Some scientists think it may be simpler than that — as naturally curious and playful mammals, orcas may just be having some fun.

The other, new, theory comes from the Bottlenose Dolphin Research Institute in Spain, which has been tracking the orca ship rammings since 2020. It has found that orca pods off the coast of Spain, who migrate in the waters between North Africa and the Iberian Peninsula, have developed a taste of Atlantic bluefin tuna, according to a paper the institute will publish next month.

That species of tuna can grow up to 10 feet long and move at speeds that orcas can’t always catch, at least not without training, said Bruno Díaz López, the institute’s chief biologist. Sailboats are often the ideal size to train on — they move quickly and silently, and close to the water’s surface, not unlike the orcas’ prey.

Researchers studying the ramming incidents have found that it is mostly young orcas who go after sailboats, but sometimes adults appear to be teaching younger members of the pod how to do so. The orcas have also figured out that the rudder is soft enough to bite, and that fiberglass makes for good ramming, Mr. Díaz López said.

“This is like a training toy,” Mr. Díaz López said. “It’s a shame that we humans are in the middle of this game, but they are learning.”

Lynsey Chutel covers South Africa and the countries that make up southern Africa from Johannesburg. More about Lynsey Chutel

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Killer whales 'tear bits off boat' in 'scary' hour-long attack off Spanish coast

The sea mammals, which can grow up to eight metres long, broke the rudder and pieced the hull of the yacht Mustique as it sailed for Gibraltar.

Friday 26 May 2023 17:56, UK

Orcas severely damaged a yacht off the coast of southern Spain - the latest in one of a number of killer whale attacks on vessels in the area.

The pod broke the rudder and pierced the hull of the Mustique while it was on its way to Gibraltar in the early hours of Thursday.

The damage forced its crew of four to contact Spanish authorities for help, a spokesman for the maritime rescue service said.

The service deployed a rapid-response vessel and a helicopter carrying a bilge pump to assist the 20-metre (66 feet) vessel, which was sailing under a British flag.

British sailor April Boyes was aboard the Mustique and shared photographs and video of the damage done by the orcas to her Instagram account.

In one of the videos, she can be heard saying, "it's like they are biting it apart".

She later said: "What started off as a seemingly unique encounter ended with orcas breaking off our rudder from the boat, then proceeding to tear bits off the boat for an hour.

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Killer whales ram and sink sailing yacht off Gibraltar coast

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"A huge hole in the hull meant we had water ingress to other parts of the boat and the engine room and I can honestly say it was a scary experience. We are all safe, I'm feeling grateful for the coastguard."

The Mustique was towed to the port of Barbate, in the province of Cadiz, for repairs.

According to the research group GTOA, which tracks populations of the Iberian orca sub-species, the incident follows at least 20 incidents this month alone in the Strait of Gibraltar between small vessels and the highly social apex predators.

In 2022, there were 207 reported interactions, GTOA data showed.

Earlier in May , the sailing yacht Alboran Champagne suffered a similar impact from three orcas half a nautical mile off Barbate.

The ship could not be towed as it was completely flooded and was left adrift to sink.

Guidelines issued by the Spanish Transport Ministry stipulate that whenever ships observe any alteration in the behaviour of orcas - such as sudden changes of direction or speed - they should leave the area as soon as possible and avoid further disturbance to the animals during the manoeuvres.

Every interaction between a ship and an orca must be reported to authorities, the ministry added.

Although known as killer whales, endangered orcas are part of the dolphin family.

They can measure up to eight metres and weigh up to six tonnes as adults.

Related Topics

Orcas have sunk another vessel off the European coast. Why won't they stop ramming boats?

By Audrey Courty

Topic: Whales

A group of three orcas repeatedly hit the rudder of a race boat in June 2023. ( Supplied: The Ocean Race )

The orcas are at it again: for the seventh time in four years, a pod of whales has sunk a boat after ramming it in Moroccan waters off the Strait of Gibraltar. 

The 15 metre-long yacht Alborán Cognac, which carried two people, encountered the highly social apex predators at 9am local time on Sunday, Spain's maritime rescue service said.

The passengers reported feeling sudden blows to the hull and rudder before water started to seep into the sailboat. It is not known how many orcas were involved.

After alerting rescue services, a nearby oil tanker took them onboard and carried them to Gibraltar, a British overseas territory on Spain's southern coast.

Nothing could be done to save the sailboat, which drifted and eventually sank. 

It's the latest incident in what has become a trend of hundreds of interactions between orcas and boats since the "disruptive behaviour" was first reported in the region in May 2020. 

The origin of this new behaviour has baffled scientists, though the leading theory suggests this "social fad" began as a playful manifestation of the whales' curiosity.

Where have orcas interacted with boats?

The latest data from the Atlantic Orca Working Group (GTOA), an organisation that contributes to the animals' conservation and management, shows that there have been at least 673 interactions since 2020. 

GTOA defines interactions as instances when orcas react to the presence of approaching boats with or without physical contact. 

The map below shows the highest numbers of encounters from April to May 2024 took place off Spain's southern coast in the Strait of Gibraltar (red zones), with some lesser activity in surrounding areas (yellow zones). 

The majority of reported encounters with orcas in April and May 2024 took place around the Strait of Gibraltar, between Spain and Morocco. ( Supplied: GTOA )

A 2022 peer-reviewed study published in the Marine Mammal Science journal found the orcas in these areas preferred interacting with sailboats — both monohulls (72 per cent) and catamarans (14 per cent) — with an average length of 12 metres.

A clear pattern emerged of orcas striking their rudders, while sometimes also scraping the hulls with their teeth. Such attacks often snapped the rudder, leaving the boat unable to navigate.

"The animals bumped, pushed and turned the boats," the authors of the report said. 

Adding this week's encounter, there have been seven reported cases of orcas damaging a boat so badly that it has sunk, though the people onboard were rescued safely each time.

In June 2023, a run-in with the giant mammals in the Strait of Gibraltar forced the crew competing in The Ocean Race to drop its sails and raise a clatter in an attempt to scare the approaching orcas off. 

No-one was injured, but Team JAJO skipper Jelmer van Beek said that it had been a "scary moment".

"Three orcas came straight at us and started hitting the rudders," he said.

"Impressive to see the orcas, beautiful animals, but also a dangerous moment for us as a team ... Luckily, after a few attacks, they went away."

After analysing 179 videos and photos of these types of interactions, which lasted on average 40 minutes, researchers concluded there was no reason to classify the events as intentionally hostile behaviour.

"The behaviour of orcas when interacting with boats is not identified as aggressive," they said.

"One of their main motivations has been identified as competition with boats for speed."

Still, the researchers of the study admitted they were not sure what triggered the novel behaviour in 2020.

"We are not yet certain what the origin of these interactions is, but it is still suspected that it could be a curious and playful behaviour," they wrote.

"[The behaviour] could be self-induced, or on the other hand it could be a behaviour induced by an aversive incident and therefore a precautionary behaviour."

Are the same orcas responsible for these incidents?

Out of around 49 orcas living in the Strait of Gibraltar, GTOA researchers found a total of 15 whales  from at least three different communities participated in the unusual interactions with boats between 2020 and 2022.

Most of those that engaged with greater intensity were juveniles, though it's unclear if others have since joined the group.

These giant mammals, which belong to the dolphin family, can measure up to eight metres and weigh up to six tonnes as adults.

The director of the Orca Behaviour Institute, Monika Wieland Shields, has said there is no evidence to prove the theory these whales were seeking vengeance against humans for a past trauma.

"While I'm sure it feels like an attack for the people on board, for the whales themselves, it really looks more like play behaviour," she said.

"There's something intriguing or entertaining to them about this [boat rudder] mechanism and they're just showing a lot of curiosity about it."

Ms Wieland said it's likely this new behaviour spread through the population as a kind of "social fad".

"Orcas are highly intelligent, very social animals, and with that comes a tendency to be curious about and explore your environment," she said.

"One thing that we see are these kind of fad behaviours that will appear in a certain population.

"One whale discovers something, they find it entertaining or interesting, or fun — it's some type of game. And then they will teach that to other members of their family group."

Are orcas dangerous to humans?

While orcas have earned their fearsome reputation for preying on other marine animals, there is no record of them killing humans in the wild. 

In captivity, orcas have killed four people since the 1990s, though it's unclear whether the deaths were accidental or deliberate attempts to cause harm.  

Ms Shields said she was worried the recent interactions between orcas and boats would skew people's perceptions of these mammals.

"I am concerned that people are going to react with fear, potentially injure or shoot at some of these whales," Ms Shields said.

"We really need to educate boaters about the best things that they can do to make themselves less attractive to the whales and the best case scenario would be the whales lose interest in this and move onto something less destructive."

Spain's Transport Ministry advises that whenever boats observe any changes in the behaviour of orcas — such as in their direction or speed — they should leave the area as soon as possible and avoid further disturbance to the animals.

The ministry also states every interaction between a ship and an orca must be reported to authorities.

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Why orcas are attacking boats in Spain

Orcas ( Orcinus orca ) have sunk three boats off the Iberian coast of Europe , and the behaviour seems to be spreading. Biologists first noted the trend in 2020. They suspect that it is a defensive behaviour, which originated with a female orca nicknamed White Gladis after it experienced an unknown trauma. Iberian orcas are critically endangered, and only 39 were recorded in the last census, in 2011.

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doi: https://doi.org/10.1038/d41586-023-01754-y

Today I’m thinking of poet Amanda Gorman, who dazzled at the last US presidential inauguration with her poem ‘ The Hill We Climb ’. She has also written about climate change in the inspirational ‘Earthrise’ , which was named for the iconic photo taken from lunar orbit by astronaut William Anders. “Being able to communicate, not just the science and the facts,” said Gorman in 2019 , “but also the artistry and the humanity — it gets to people in a way that I think is unique, to try to get people not to feel scared but to feel prepared to become agents of change.”

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Killer whales attack and sink sailing yacht in the Strait of Gibraltar — again

By Emily Mae Czachor

Updated on: May 14, 2024 / 4:54 PM EDT / CBS News

A sailing yacht sunk in the Strait of Gibraltar on Sunday after an unknown number of orcas  slammed into the vessel with two people on board and caused a water leak, officials said. Both crew members were rescued by a passing oil tanker, said Spain's maritime rescue service, marking the latest killer whale attack on a boat in what has become a pattern in recent years.

The incident happened at around 9 a.m. local time in the narrow strait between Spain and Morocco that has become a notorious site of human interactions with pods of killer whales that, for reasons still not fully understood, ram into boats and at times even sink them . In this case, crew members on board the SV Alboran Cognac yacht put out an emergency call for an evacuation after they encountered orcas roughly 14 miles off the coast of Cape Spartel. 

The crew members reported feeling blows to the hull of the vessel and rudder, which was damaged by the whales, the rescue service said. The agency's coordination center in Tarifa, on the Spanish side of the Strait of Gibraltar, helped arrange for their evacuation via the tanker MT Lascaux. The tanker was able to collect the crew members from the sinking yacht within the hour, and they disembarked in Gibraltar before 10:30 a.m. They abandoned the SV Alboran Cognac, which proceeded to completely disappear into the ocean.

Anyone sailing through waters from the Gulf of Cádiz in southern Spain and the Strait of Gibraltar, either in a larger motorized vessel or a personal sailing boat, is advised to avoid certain areas that the maritime rescue service marks as potentially dangerous spots for orca interactions. The greatest threats exist between May and August, when officials say that pods of killer whales are most commonly seen in those parts of the Atlantic. 

But previously recorded incidents suggest those dangers may be present at any time. Last October, a Polish boat touring company reported that a pod of orcas had managed to sink one of its yachts after repeatedly slamming into the steering fin for 45 minutes, causing it to leak. Last June, two sailing teams competing in an international race around the world reported frightening scenarios in which multiple orcas rammed into or pushed up against their boats or as they sailed west of Gibraltar. 

No one on board any of the vessels was hurt in those encounters, but the documented rise in confrontational behavior has researchers and sailors trying to determine why orcase have attempted to sink or capsize so many boats off the coasts of Spain and Portugal. 

Some sailors have even resorted to blasting thrash metal music in a bid to deter the apex predators.

Reports of orcas interacting with humans have more than tripled in the last two years or so, according to the research group GTOA, which has documented hundreds of such incidents in the region since 2020. But some of the latest data points to possible changes in the orcas' etiquette, with the group reporting only 26 interactions in the Strait of Gibraltar and Bay of Biscay areas between January and May of this year. That number is 65% lower than the number of interactions recorded in the region over the same months last year, and 40% lower than the average number of interactions recorded in the same months between 2021 and 2023, according to GTOA.

• Boat Accident

Emily Mae Czachor is a reporter and news editor at CBSNews.com. She covers breaking news, often focusing on crime and extreme weather. Emily Mae has previously written for outlets including the Los Angeles Times, BuzzFeed and Newsweek.

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Orcas have sunk 3 boats in Europe and appear to be teaching others to do the same. But why?

Scientists think a traumatized orca initiated the assault on boats after a "critical moment of agony" and that the behavior is spreading among the population through social learning.

Orcas have attacked and sunk a third boat off the Iberian coast of Europe, and experts now believe the behavior is being copied by the rest of the population.

Three orcas ( Orcinus orca ), also known as killer whales, struck the yacht on the night of May 4 in the Strait of Gibraltar, off the coast of Spain, and pierced the rudder. "There were two smaller and one larger orca," skipper Werner Schaufelberger told the German publication Yacht . "The little ones shook the rudder at the back while the big one repeatedly backed up and rammed the ship with full force from the side." 

Schaufelberger said he saw the smaller orcas imitate the larger one. "The two little orcas observed the bigger one's technique and, with a slight run-up, they too slammed into the boat." Spanish coast guards rescued the crew and towed the boat to Barbate, but it sank at the port entrance.

Two days earlier, a pod of six orcas assailed another sailboat navigating the strait. Greg Blackburn, who was aboard the vessel, looked on as a mother orca appeared to teach her calf how to charge into the rudder. "It was definitely some form of education, teaching going on," Blackburn told 9news .

Reports of aggressive encounters with orcas off the Iberian coast began in May 2020 and are becoming more frequent, according to a study published June 2022 in the journal Marine Mammal Science . Assaults seem to be mainly directed at sailing boats and follow a clear pattern, with orcas approaching from the stern to strike the rudder, then losing interest once they have successfully stopped the boat.

"The reports of interactions have been continuous since 2020 in places where orcas are found, either in Galicia or in the Strait," said co-author Alfredo López Fernandez , a biologist at the University of Aveiro in Portugal and representative of the Grupo de Trabajo Orca Atlántica, or Atlantic Orca Working Group.

Related: Grisly new footage shows orcas attacking a great white shark and eating its liver  

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Most encounters have been harmless, López Fernandez told Live Science in an email. "In more than 500 interaction events recorded since 2020 there are three sunken ships. We estimate that killer whales only touch one ship out of every hundred that sail through a location."

The spike in aggression towards boats is a recent phenomenon, López Fernandez said. Researchers think that a traumatic event may have triggered a change in the behavior of one orca, which the rest of the population has learned to imitate.

"The orcas are doing this on purpose, of course, we don't know the origin or the motivation, but defensive behavior based on trauma, as the origin of all this, gains more strength for us every day," López Fernandez said. 

Experts suspect that a female orca they call White Gladis suffered a "critical moment of agony" — a collision with a boat or entrapment during illegal fishing — that flipped a behavioral switch. "That traumatized orca is the one that started this behavior of physical contact with the boat," López Fernandez said.

Orcas are social creatures that can easily learn and reproduce behaviors performed by others, according to the 2022 study. In the majority of reported cases , orcas have made a beeline for a boat's rudder and either bitten, bent or broken it.

"We do not interpret that the orcas are teaching the young, although the behavior has spread to the young vertically, simply by imitation, and later horizontally among them, because they consider it something important in their lives," López Fernandez said.

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Orcas appear to perceive the behavior as advantageous, despite the risk they run by slamming into moving boat structures, López Fernandez added. Since the abnormal interactions began in 2020, four orcas belonging to a subpopulation living in Iberian waters have died, although their deaths cannot be directly linked to encounters with boats.

The unusual behavior could also be playful or what researchers call a "fad" — a behavior initiated by one or two individuals and temporarily picked up by others before it’s abandoned. "They are incredibly curious and playful animals and so this might be more of a play thing as opposed to an aggressive thing," Deborah Giles , an orca researcher at the University of Washington and at the non-profit Wild Orca, told Live Science.

As the number of incidents grows, there is increased concern both for sailors and for the Iberian orca subpopulation, which is listed as critically endangered by the IUCN Red List . The last census, in 2011, recorded just 39 Iberian orcas, according to the 2022 study. "If this situation continues or intensifies, it could become a real concern for the mariners' safety and a conservation issue for this endangered subpopulation of killer whales," the researchers wrote. 

Sascha is a U.K.-based trainee staff writer at Live Science. She holds a bachelor’s degree in biology from the University of Southampton in England and a master’s degree in science communication from Imperial College London. Her work has appeared in The Guardian and the health website Zoe. Besides writing, she enjoys playing tennis, bread-making and browsing second-hand shops for hidden gems.

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Orcas sank three boats off the coast of Portugal, but don't call them 'killer' just yet

Three recent incidents of orcas seemingly attacking and sinking boats off the southwestern tip of Europe are drawing intense scrutiny over whether the animals deliberately swarmed the vessels and if they are learning the aggressive behavior from one another.

Encounters between orcas, or killer whales, and boats have been increasing since 2020, though no human injuries or deaths have been reported. In most cases, the whales have not sunk the boats.

The string of incidents since 2020 prompted one scientist in Portugal to say the attacks may indicate that the whales are intending to cause damage to sailing vessels. Others, however, are more skeptical, saying that while the behavior may be coordinated, it’s not necessarily coordinated aggression.

“I think it gets taken as aggression because it’s causing damage, but I don’t think we can say that the motivation is aggressive necessarily,” said Monika Wieland Shields, director of the Orca Behavior Institute, a nonprofit research organization based in Washington state.

At least 15 interactions between orcas and boats off the Iberian coast were reported in 2020, according to a study published last June in the journal Marine Mammal Science .

In November 2020, Portugal’s National Maritime Authority issued a statement alerting sailors about “curious behavior” among juvenile killer whales. The statement said the whales may be attracted to rudders and propellers and may try to approach boats.

The subsequent sinkings have caused more alarm.

The most recent encounter occurred on May 4 off the coast of Spain. Three orcas struck the rudder and side of a sailing yacht, causing it to eventually sink, as was reported earlier this month in a German publication called Yacht .

One theory put forward by Alfredo López Fernandez, a biologist at the University of Aveiro in Portugal, suggested that the aggression started from a female orca that was perhaps struck by a boat — a traumatic experience that caused her to start ramming sailing vessels. López Fernandez, who co-authored the June 2022 study published in Marine Mammal Science, told Live Science that other orcas may have then picked up that behavior through social learning, which whales have been known to exhibit.

But Shields said orcas have not historically been known to be aggressive toward humans, even when they were being hunted and placed in captivity.

“They’ve certainly had reason to engage in that kind of behavior,” she said. “There are places where they are shot at by fishermen, they’ve watched family members be taken from their groups into captivity in the ‘60s and ‘70s. And if something was going to motivate direct aggression, I would think something like that would have done it.”

Shields added that there are no clear instances of killer whales exhibiting what could be thought of as revenge behavior against humans.

She said the recent attacks on boats are likely more consistent with what’s known as “fad” behavior, which describes novel but temporary conduct from one whale that can be mimicked by others.

“It’s kind of a new behavior or game that one whale seems to come up with, and it seems to spread throughout the population — sometimes for a matter of weeks or months, or in some cases years — but then in a lot of cases it just goes away,” she said.

In the Pacific Northwest, for instance, Shields and her colleagues have observed fad behavior among Southern Resident killer whales who started carrying dead salmon around on their heads for a time before the behavior suddenly stopped.

Shields said the behavior of orcas off the Iberian coast may also be temporary.

“This feels like the same type of thing, where one whale played with a rudder and said: ‘Hey, this is a fun game. Do you want to try it?’ And it’s the current fad for that population of orcas,” she said.

While Shields did not dismiss the trauma response theory out of hand, she said it would be difficult to confirm without more direct evidence.

“We know their brains are wired to have really complex emotions, and so I think they could be capable of something like anger or revenge,” she said. “But again, it’s just not something that we’ve seen any examples of, and we’ve given them plenty of opportunities throughout the world to want to take revenge on us for various things. And they just choose not to.”

Denise Chow is a science and space reporter for NBC News.

Why are killer whale attacks on the rise? These scientists set sail to find out

A BOARD A BOAT IN THE STRAIT OF GIBRALTAR — From the surface, the azure waters seem calm and inviting in this narrow patch where the Atlantic Ocean meets the Mediterranean Sea .

Spain’s arid coast looms in one direction; the tip of Africa in another, less than 10 miles away. From time to time, schools of small fish breach the water in unison, as if in symphony.

But with binoculars trained on the horizon, the boat’s captain is on the lookout for something potentially far more unsettling: orcas, also known as killer whales, who in recent years have taken to slamming boats with alarming regularity.

Over the last five years, roughly 700 orca run-ins have been recorded, according to the Atlantic Orca Working Group-GTOA, a partnership of Spanish and Portuguese scientists that monitors the Iberian killer whale population. At least a half-dozen yachts, fishing vessels and sailboats have sunk.

For the Spanish fisherman who take to the Strait of Gibraltar nightly hunting for tuna, marlin and swordfish, the likelihood of an orca run-in has added another harrowing element to an already dangerous job.

“Of course they can sink you,” fisherman Manuel Merianda told NBC News earlier this month as he plucked out errant stingrays trapped in his fishing net after harvesting the night’s catch. “They break your rudder and water and waves begin to enter your boat, and once the water enters there is nothing you can do.”

On one of his recent fishing trips, Merianda’s boat was followed by a pod of orcas, an experience he described as terrifying. Yet when asked if that risk made orcas his enemy, Merianda shook his head.

“We are the ones who are in their habitat,” he said in Spanish. “We are the ones who don’t have to be there.”

The encounters have nonetheless become so frequent that Spanish authorities have issued an alert, urging sailors to stay close to the coastline, where the orcas don’t tend to stray, especially during the summer months.

Often the creatures will ram into the rudders, potentially rendering the vessels inoperable, or even bite off pieces of the boats.

Why Iberian orcas are attacking ships in the Strait of Gibraltar, one of the world’s busiest waterways, has quickly become one of the terrifying mysteries of the sea. The highly intelligent animals are known to be generally peaceful, especially toward humans, and before 2020, such interactions were basically unheard-of.

Not everyone believes these events, while harrowing and dangerous, constitute “attacks” in the literal sense of the word.

“Attacking implies something aggressive towards humans,” said Janek Andre, whose organization WeWhale tries to protect orcas. “These orcas are simply playing. So in the end, we call it — and everybody should call it — an interaction.”

Nearly every day during summer months, Andre and his teammates board a small boat on the Spanish coast and sail into the strait to track the movement of the orcas. When they spot them, they radio their location to sailors in the area, encouraging them to stay away.

Marine biologists have a host of competing theories for what the orcas are doing, from the “play” theory championed by Andre to the notion the orcas are retaliating, either for damage that boats have done to orcas in the past or for human-caused pollution of the waters they rely on.

One theory holds that it may just be a fad — that the orcas, like popularity-chasing teenagers, have simply picked up a curious learned behavior that for whatever reason has become the trend of the moment.

But new research offers a competing theory that’s gained traction among those who study the orcas’ habitat.

Scientists from the Bottlenose Dolphin Research Institute, based on Spain’s northwest coast, have pointed out that in recent years, the once-dwindling population of Atlantic bluefin tuna has recovered, in the process becoming the linchpin of the orcas’ diet. Atlantic bluefin tuna are tough prey: They swim faster than orcas and grow up to 13 feet long.

In a paper published this month in the scientific journal Ocean and Coastal Management, the scientists argue that what humans see as attacks are actually older orcas training the younger ones on hunting methods needed to successfully overcome their prey.

“They need to ram, they need to hit, they need to bite, to isolate this large tuna. And then this has to be in cooperation,” Bruno Diaz Lopez, the institute’s founder and chief biologist, said in an interview. “So how do they reinforce this technique? Practicing.”

Orcas, or “killer whales,” can grow up to 27 feet long and weigh as much as six tons. Known as the ocean’s top predator, they’re extremely intelligent, with their own languages of clicks and whistles that differ from region to region.

The subspecies striking boats is called the Iberian orca, and its future is anything but certain. The creatures are on the International Union for Conservation of Nature’s “Red List” of critically endangered species. Only about 35 of them are still believed to be alive, and their reproductive rates have become alarmingly low.

Faced with the need to share the waters with gigantic mammals, sailors in the strait have tried various ways to deter orcas when they show up. Some make noise to try to scare them away, throw sand in the water, or push their motors to full speed and try to leave the area. Others advocate turning off the engine, keeping silent and playing dead.

As he plotted a course through rippling waters back toward the coast of Spain, Andre, the WeWhale founder, said he believed humans would never know with certainty why so many orca interactions are taking place.

“We are not orcas. So you can do a lot of science and studies,” Andre said. “But in the end, it’s such an unknown world for us, what’s happening below the water and how these animals actually interact.”

This article was originally published on NBCNews.com

Why are orcas attacking boats and sometimes sinking them?

After four years and hundreds of incidents, researchers remain puzzled why orcas, also known as killer whales, continue to ram boats – sinking a few of them – along the Iberian Peninsula. The most-recent incident was the sinking of a yacht on Oct. 31 in the Strait of Gibraltar.

The origin of these interactions remain a "great mystery," said Alfredo López, a University of Santiago biologist, but he does not believe the behavior is aggressive. Orcas are large dolphins, López said. And like dolphins, the events could stem from the orcas’ curious and playful behavior, such as trying to race the boats.

López, who specializes in orcas, and his team, Grupo de trabajo Orca Atlántica (GOTA) , have tracked these encounters since 2020. The team’s recent study theorizes the orcas could also be exhibiting cautionary behavior because of some previous traumatic incident.

Where have killer whales interacted with boats?

GOTA has tracked more than 350 interactions just on the Iberian Peninsula since 2020. Most have taken place along the Strait of Gibraltar, but the orcas’ mischief or self-defense may be spreading north. An incident was reported in June in the  Shetland Islands in Scotland .

GOTA defines interactions as instances when orcas react to the presence of approaching boats, such as:

• Interaction without physical contact.
• Some physical contact without damage.
• Contact that causes serious damage that could prevent the navigation of the boat.

Recent incidents when orcas attacked boats and sank them

The Oct. 31 incident occurred in the Strait of Gibraltar where a pod of orcas sank a mid-size sailing yacht named the Grazie Mamma after a 45-minute interaction,  Live Science reported . 

On June 19 an orca rammed a 7-ton yacht multiple times off the Shetland Islands in Scotland, according to an account from retired Dutch physicist Dr. Wim Rutten in the Guardian.

"Killer whales are capable of traveling large distances, so it is not out of the ordinary that an animal could travel that far," said Tara Stevens, a marine scientist at CSA Ocean Sciences Inc. "To my knowledge, this data is not available, so we cannot confirm at this time if these are the same animals." 

Including the Oct. 31 incident, orcas have sunk four boats this year. The previous sinking occured in May , off the coasts of Portugal and Spain, but whale expert Anne Gordon told USA TODAY  in May that the incidents shouldn't heighten concerns about the whales.

"Yes, they're killer whales. And yes, their job is to be predators in the ocean, but in normal circumstances there is absolutely zero threat to humans in a boat," Gordon said .

Most of the interactions have involved sailboats, but fishing boats, semi-rigid boats and motorboats haven’t gone unscathed. 

Are these the same killer whales attacking boats or unrelated incidents?

López hypothesizes that the interactions could be a self-induced behavior where you're "inventing something new and repeat it. This behavior coincides with the profile of the juveniles." He said it could also be response to an aversive situation: "One or several individuals had lived a bad experience and tried to stop the boat so as not to repeat it. This behavior coincides with the profile of adults."

"Fifteen different orcas from at least three different communities" have been identified, López said. And they are probably teaching the habit to others, or the others are mimicking the behavior. "Without a doubt orcas learn by imitation," López said.  The majority of the culprits are juveniles that touch, push and sometimes turn the vessels. He noted that adult males don't appear to be involved.

"Killer whales are incredibly intelligent animals that do learn behaviors from observation of other individuals," Stevens said. "Typically, very unique behaviors such as this are learned 'within' group, meaning individuals of the group may learn from each other and participate, but that does not necessarily mean that the behavior is shared outside the group with other individuals."

Which pods of killer whales are battering the boats?

Orcas operate in a social structure called a pod. These pods generally are a group of several generations of related orcas. Hierarchies are established within them, and they communicate and learn from one another, the study reads.

GOTA researchers have identified the individuals responsible for the interactions . One large pod is made up of three generations. It starts with grandmother Gladis Lamari, her daughter, grandchildren and a few other relatives.

Another pod comprises siblings Gladis Negra and Gladis Peque. Both have been photographed interacting with boats. Their mother, Gladis Herbille, has generally just watched her children at a distance from the boats, the study said.

A third group in the study are siblings and a cousin.

Orcas often tracking bluefin tuna

The movements of orcas depend on the location of their main food source, bluefin tuna. The migratory movements of tuna are very dynamic and predicting exactly where interactions will take place is very difficult, the report said. According to NOAA , Atlantic bluefin tuna are the largest in the tuna family and can reach a length of 13 feet and up to 2,000 pounds. They are a highly migratory species and can migrate thousands of miles across an entire ocean.

About the Iberian orcas

While they are called killer whales, orcas are actually the largest member of the dolphin family. This aquatic marine mammal family includes whales, dolphins and porpoises.

The Iberian orca is a subpopulation of the Atlantic orca population. These orcas are from the Strait of Gibraltar and the Gulf of Cádiz. Iberian orcas are small: 16 to 21 feet compared with Atlantic orcas that measure almost 30 feet.

Orcas in general are fast, reaching speeds up to 27.6 mph. By comparison, a 39-foot sailboat travels at about 9.2 mph.

What should you do if your boat is attacked by killer whales

The study recommended these tips to reduce the duration and intensity of the interaction.

• Stop the boat.
• Leave the rudder loose.
• Radio for help.

According to the GOTA study, most of the vessels involved in interactions are medium-sized (less than 49 feet) sailboats, with a paddle rudder, sailing at an average of 6.9 mph, under both sail and motor.

The interactions have been mostly concentrated in the spring and summer months and have been concentrated in the midday hours. They've lasted on average for 40 minutes, but several last less than 30 minutes. 

Types of rudders Iberian orcas have approached

"It is very common for dolphins to interact with the boats and approach," López said. "Before 2020, the orcas did it with frequency but they weren't classified as attacks. Now, sometimes they touch the boat and the encounter is unfairly classified as an attack. They judge socially before understanding what (orcas) do."

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Tourist dies after losing her leg in shark attack off Canary Islands

A German tourist died after being bitten by a shark on Monday while sailing off Spain's Canary Islands , the coastguard said.

The 30-year-old woman lost a leg in the attack and died of a heart attack later while being transported in a Spanish rescue helicopter, a coastguard spokesman told AFP.

She was sailing in a British catamaran in the Atlantic some 278 nautical miles southwest of the island of Gran Canaria when the shark struck. She was attacked while swimming beside the catamaran, Reuters reported.

Emergency services received an alert at 1255 GMT calling for a medical evacuation and sent a military plane and helicopter after also contacting the Moroccan coastguard.

The woman was taken on board the helicopter in the evening around 1800 GMT and was bound for hospital in the Gran Canaria town of Las Palmas when she died, the spokesman said.

Boat-tracking website vesselfinder.comindicated that the boat, the Dalliance Chichester, had left the port of Las Palmas on September 14.

Shark attacks are rare, with a total of 69 confirmed unprovoked attacks worldwide and  14 fatalities reported last year , according to the International Shark Attack File, which is administered by the Florida Museum of Natural History and the American Elasmobranch Society. The report noted that a "disproportionate" amount of people  died from shark bites in Australia  last year when compared with other countries, and Australia accounted for about 22% of the world's unprovoked shark attacks in 2023.

The deadly attack comes less than a month after a shark killed a 16-year-old high school student in Jamaica.

In July, a  surfer lost his leg  after a great white shark attacked him in Australia. The month before that, surfer  Tamayo Perry died  after sustaining fatal injuries in a shark attack off the island of Oahu in Hawaii.

In January, a young fisherman diving for scallops was  killed by a shark  off the Pacific coast of Mexico.

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