Despite their name, killer whales (orcas) are actually dolphins.

The orca on the left carries kelp in its mouth, allowing the whales to "allokelp," or roll the plant between their two bodies. - Center for Whale Research Editor’s Note: Call to Earth is a CNN ...

Using tools borrowed from human medical research, we found that male dolphins with stronger social bonds appear biologically younger than their less social counterparts. This means their bodies show ...

Dolphins are among the smartest creatures on the planet, and a new AI model from Google combined with Pixel phones is helping researchers better understand their language -- and even hopefully ...

How big they are: From 5 to 32 feet (1.5 to 10 meters) long, depending on the species Dolphins live in almost every ocean, except most tend to avoid the cold waters in the Arctic and around Antarctica ...

Behavioral ecologist Michael Weiss was browsing through new drone footage of the orca pods he studies in the Salish Sea when he spotted one of the killer whales carrying something green in its mouth ...