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

Deep in the Pacific, humans have tracked a mysterious whale’s call for decades—but no other whale seems to respond. And now, we might be running out of time to find the source.

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 ...

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

Surveyors with the New England Aquarium spotted the whales, estimated to represent 15% of the endangered species' global population ... we’re not ready for them all the time,” O’Brien ...

BOSTON - About 75 North Atlantic right whales, representing about 20% of the critically endangered species' population worldwide, have gathered in an area off the coast of New England. A aerial ...

The federal government is withdrawing a proposal that would require more ships to slow down in East Coast waters to try to save a vanishing species ... who all have a stake in the whale's fate.

Koala and Curlew, two endangered female North Atlantic right whales have gone off course, perplexing researchers.

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 ...