Gray whales travel from the Arctic to Mexico each year. And they're not finding enough to eat, scientists say.

Humans have driven sharks and their cousins to the brink of extinction. The health of the entire ocean is at stake.

New footage from Hawaiian waters shows something that should be impossible: unlikely companions sharing dinner without any ...

Researchers bring a SETI approach to the question of what—if anything—humpbacks’ underwater smoke rings might be trying to ...

In a world full of bad news, there’s been good news in whale conservation. Many of the great whales are coming back. In fact, ...

Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans.

The directors of 'Ocean with David Attenborough' share their favorite locations from the new documentary film.