national geographic

Orcas, sometimes called killer whales, are the ultimate apex predators. They are physically imposing, for starters: fast, powerful, and vicious. But they're also brilliant and are generally considered one of the smartest animals on the planet. It's their brains that truly make them elite hunters.

If you need an example of how proficient they are at killing, they purposefully hunt and eat great white sharks along with their steady diet of fish and seals. Typically, they hunt great whites in groups, but a single orca is more than capable of easily handling what is usually considered one of the scariest and deadliest creatures in the ocean.

Orcas have a variety of incredible hunting techniques at their disposal. They're best known for their "wave wash" move, in which a pod of orcas will swim full speed at an ice block and create a huge wave to knock off any seals that may be sheltering on it. They also "karate chop" sharks with their tails and flip them upside down, causing the sharks to go into a state of near paralysis, making them an easy meal. Orcas can even take on much larger species of whales by preventing them from reaching the surface to breathe and drowning them.

In other words, when a pod or orcas zeroes in on potential prey, there's almost nothing that can stop the hunt. Except maybe a humpback whale.

They look so friendly, but they're the ultimate hunters. Giphy

Humpback whales have been displaying a strange behavior lately.

The whales have been caught purposefully disrupting orca hunts. It's almost as if they're trying to save the seals and other animals once killer whales set their sights on them. It's likely a behavior that's been happening for a long time, but it's become extremely well-documented in just the last couple of decades.

A team from National Geographic recently caught one such encounter on film in the waters of Antarctica.

In the video, a pod of orcas is spotted by explorer Bertie Gregory as they zero in on a Weddell seal perched atop a chunk of ice. The whales ready themselves for their famous "wave wash" move, charging together at the ice block...but no wave comes.

“They swam under the chunk of ice, just like they normally do, but we could see no breaking wave, and we were like, ‘Oh, they must have messed it up,” says Gregory according to National Geographic. “But instead they were making an underwater shockwave.”

The whales were impressively able to destroy the seal's ice perch from below, sending him into the water, where the hunt was on. But pretty quickly, it became apparent that the seal had backup.

“Then, all of a sudden, two humpback whales just turn up,” says Gregory. “They do this amazing trumpeting noise [that’s] so loud, it reverberates in the hull of the boat, like an elephant trumpeting.”

Though not as speedy, nimble, or vicious, humpback whales are quite a bit larger than orcas; making their presence pretty disruptive. The filmmaking team firmly believed that the humpbacks were purposefully trying to protect the seal and screw up the hunt. In many cases just like this one, the humpbacks are successful at driving the orcas away.

Sadly for the seal, the humpbacks arrived too late this time. The orcas even appeared to gloat with their kill afterward. A little petty, but the killer whales were understandably annoyed.

Watch the whole fascinating incident here:

- YouTube www.youtube.com

Despite their size, getting tangled up with a pod of hungry orcas is extremely dangerous for a humpback whale. So why risk their lives trying to save some random seal?

Orcas regularly take down great whites, one of the ocean's top predators, and have even been known to hunt blue whales—the largest animal on the planet! So no matter how big you are, you probably don't want to mess with a pod of killer whales.

Some people, experts included, see the seal-saving behavior as a sign of altruism. Altruism, of course, referring to a selfless action—one in which there's no inherent benefit for the whale. Humpback whales: Protectors of the ocean. Has a nice ring to it, right?

Another incredible seal-saving incident was observed in 2009. In this case, the humpbacks were successful in saving the seal, with one of them actually carrying it on its belly to shield it from the orcas. If that's not altruistic, I don't know what is.

A more likely explanation, however, is that the humpbacks are launching proactive attacks on orcas in response to killer whales regularly hunting their calves.

"I think they just have a simple rule," marine ecologist Robert Pitman told Science.org. "When you hear a killer whale attack, go break it up."

Humpback whales live by a simple rule: Troll the orcas whenever possible. Giphy

It's similar to an animal behavior called "mobbing," where groups of prey animals will band together to drive predators out. In a 2022 study published on Science Direct, Nora V. Carlson and Michael Griesser write, "Mobbing is an important anti-predator behavior where prey harass and attack a predator to lower the immediate and long-term risk posed by it, warn others, and communicate about the predator's threat."

Humpbacks have strong memories, and they may remember and even have trauma from previous killer whale attacks. So, they probably figure: let's go get them before they get us!

All that being said, altruistic behaviors do exist in the animal world. Animals of the same species or, particularly, ones that live in the same social group, often help each other or make sacrifices for the greater good. But cross-species cooperation does happen, too. Dolphins have been known to help stranded whales or even save humans from shark attacks. Many animals have been documented adopting orphaned young of another species.

In all of these cases, there may be some benefit to the animals that we don't understand. But it's a lot more fun to imagine, especially in the case of the humpbacks, that they're doing it just to be kind.