Recently, people have spotted killer whales engaging in some unique behavior. They are rubbing their bellies along the rocks ...

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 ...

'Amongst all the different killer whale populations around the world, there's only a couple that have been observed doing this behavior,' one expert said ...

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 ...