Killer whale punts a sea lion 20 feet in the air to show calf how it’s done. A killer whale calf that is several months old swims with an adult in its pod during a hunting session.

A study published in the journal Current Biology describes a new example of tool use by a critically endangered population of ...

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

Resident killer whales maintain tight-knit family pods while Bigg’s killer whales roam in smaller groups; Residents prey on salmon and other marine fish, while Bigg's preys on seals and whales; ...

Dubbed "allokelping," it might be a unique cultural phenomenon that's as endangered as the orca population itself ...

The whales use quick body movements to tear pieces of bull kelp for use as tools, perhaps the first known toolmaking by a marine mammal.

In 1992, a colleague had returned from a fishing trip in Baja with a story about seeing two killer whales attacking a whale shark. But Ms. Schulman-Janiger was never able to confirm the event.

Killer whales are known for their intelligence and power, even an inclination to sink yachts. Now, research is showing how they take down prey that few other animals can. Orcas in Mexico's Gulf of ...