According to their results recently published in the journal Ecology and Evolution, the culprit is clear: a killer whale ...

The adult female, seeking a new home with her calf after the closure of Marineland in France, faces the grim reality of ...

How big they are: Up to 32 feet (9.8 meters) long How long they live: Up to 100 years, but usually around 25 to 50 years What they eat: Fish, seals, seabirds, squid, sharks, and even whales Orcas ...

Avoiding predators is one of the most important jobs for many members of the animal world. Even ocean giants like baleen whales have something to fear from killer whales, their only known natural ...

Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton diet from the water. More solitary than toothed whales, baleen whales face ...

Orcas, like humans, get baby bumps in the early months of pregnancy and grow larger as the pregnancy advances. Researchers ...

The 39-foot gray whale carcass was discovered floating off Marina del Rey on Saturday with most of its head missing.

Some baleen whales avoid killer whale attacks by singing songs at deep frequencies that their predators cannot hear.

UPDATE: Orcas might not have killed the whale despite an initial claim by a prominent researcher. An examination of the carcass after the whale washed ashore revealed possible shark bites ...

Orcas, also called killer whales, are apex predators of the ocean. Their intelligence, hunting skills, and sheer power make ...

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...