The rare and awe-inspiring gestures were documented off the coasts of B.C., California, New Zealand and Norway. Researchers ...

Wild orcas on more than 30 occasions in four oceans have attempted to share their prey with people, potentially to develop ...

Like a proud cat leaving a bird on its owner's doorstep, orcas—also called killer whales—may sometimes offer to share their ...

Researchers using a new drone say they have observed killer whales finding and modifying stalks of kelp to preen each other.

And killer whale youngsters are fond of playing kelp keep-away. But what the southern residents are doing with the kelp ...

A pod of humpback whales encountered a group of killer whales during feeding time off the coast of California. On June 24, a ...

Orcas were spotted using kelp as a grooming tool on each other, the first known use of tools among cetaceans for something ...

In a new sign of toolmaking in marine mammals, orcas in the Pacific Northwest were recorded rubbing stalks of kelp against ...

Orcas have been spotted giving each other rubdowns with kelp tools, rubbing pieces of the seaweed between their bodies.

The more we learn about orcas, the more remarkable they are. These giant dolphins are the ocean's true apex predator, preying ...

In the first known toolmaking by a marine mammal, southern residents have been documented detaching lengths of seaweed and ...

The discovery — published June 23 in Current Biology — constitutes the “first evidence” recorded of tool-making by marine ...