Orcas have long been categorized as a single species, although some scientists have questioned this classification in recent decades. Now, researchers propose that two orca populations in the eastern ...

A group of extremely endangered whales have been spotted swimming and feeding off the Maine coast. Biologists from the New England Aquarium conducted an aerial survey that discovered North Atlantic ...

Of the 33,000 species of fish and the countless species yet to be discovered, all of them have vertical tail fins that undulate side-to-side. Despite their myriad shapes, sizes, and habitats, they all ...

True or false: The best time to go whale-watching in Southern California is between November and April, when gray whales migrate along the coast between Mexico and Alaska. False-ish. Yes, it’s truly ...

Nearly 100 pilot whales became stranded on a beach in Western Australia on Tuesday. Two days and a near-successful rescue attempt later, they are all dead. The long-finned pilot whale pod became ...