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 ...

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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 ...

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

Underwater shot of a pod of killer whales (orcas orcinus) circling the sun in blue ocean - seamless looping high quality 3d animation Close up of Humpback whale calf swimming along the surface in ...

Six environmental groups are suing two federal ministers over a delay in issuing an emergency-order recommendation to protect B.C.’s endangered killer whale population.

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

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 ashore near ...

Over time, that name morphed into "killer whales." Scientists don't know whether orcas kill for fun. The marine mammals do some things, like killing and tossing dead porpoises in the air ...

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