Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton ...

The clip shows a group of seven orcas — four adults and three calves — as they circle a seal on a tiny chunk of ice in ...

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.

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

A welcome sight Thursday morning: Orcas in the Puget Sound. Experts say there’s one distinct thing people should know about ...

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

Learn more about how baleen whales split into two groups — fight or flight — and how these groups determine how loud they sing.

A newborn killer whale calf spotted off the southern coast of WA could be one of the youngest ever seen in Australian waters.

Recent findings used wildlife forensics and citizen science data to provide the first confirmed evidence of killer whale ...

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 ...