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

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 ...

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

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 ...

After being freed, “it began to swim and drive, showing all the great behavior we hope to see in a humpback,” an official ...

Scientists confirm that orcas and dolphins have lost the ability to return to dry land due to irreversible evolutionary ...

An orca calf less than 24 hours old has been spotted in a rare sighting of a newborn killer whale in Western Australia. The animals are regularly seen off Bremer Bay in summer, but calves are ...

Rochelle BakerLocal Journalism Initiative ReporterCanada's National ObserverFor a second time, the world watched as Tahlequah ...

For the first time, DNA evidence has confirmed killer whales in Australia hunted a white shark for its liver. Based on DNA analysis from the bite wounds on the carcass of a large white shark washed ...

Behind me, I hear a rush of breath—the sound of a killer whale expelling air from their blowhole. I can’t turn around to look. I’m holding onto a metal crane, on the other end of which is a ...