A massive killer whale swam deep into Yaquina Bay, hunting alone and stunning onlookers. Here's what we know about T049C — ...

Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans. Here's what they think is going on.

Unlike the endangered Southern Residents population, whose calls are tightly patterned and used for complex group cohesion, ...

A new orca calf was spotted in Puget Sound last week that is part of the family of the last killer whale that was captured in U.S. waters. The new Bigg's, or mammal-hunting, orca calf was spotted ...

The orca calf belongs to a family of transient killer whales, or “Bigg’s” killer whales, and was first spotted in the Salish Sea on Thursday, March 20, between Port Townsend and the San Juan ...

The orca is one of only a handful of mammals known to go through menopause. The reason has remained murky, but now, new research suggests why: Grandmothers boost the survival of their grandcalves.

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 ...

A “sweet family” of sea creatures was spotted off the coast of California, and onlookers are calling it an “exciting ...