Though researchers have some best guesses, nobody seems to know for sure why exactly a killer whale in Washington state was ...

The male killer whale isn't the only orca to disappear recently. Researchers also did not see a baby orca belonging to the L pod during the Oct. 29 encounter, the Center for Whale Research said.

KILLER whales have declared war on the world's biggest sharks as they train themselves in new deadly skills to kill the sea beasts. Orcas have been spotted in the Gulf of California hunting down ...

There have been isolated reports in the past of killer whales (also known as orcas) attacking a whale shark. But a study, published Friday in the journal Frontiers in Marine Science is the first ...

Marine biologists have documented a remarkable hunting strategy employed by killer whales in the southern Gulf of California, in which they harvest whale sharks' organs. Researchers in Mexico have ...

They recently documented orcas feeding on dolphins for the first time off Chile’s coast. A few months earlier, researchers reported the first instance of a lone killer whale hunting and eating a ...

Orcas, better known as killer whales, have been spotted hunting whale sharks, the world's largest shark species, that can grow up to 40 feet -- which has surprised the scientists. The orca pod ...

Pictures and videos have revealed new, specialised hunting techniques used by killer whales to attack the world's largest fish, according to scientists. On four occasions caught on video ...