The species Orcinus orca, generally known as orcas or killer whales, is made up of many genetically distinct populations ...

Biologists discovered killer whales and dolphins working together to hunt salmon, a behavior never before documented in this ...

A study comparing the nutritional demands of killer whales with the caloric content of their prey has startling implications for the potential impact of these large predators on populations of other ...

Inner coast transient killer whale hunting close to a Steller sea lion haulout off the outer coast of Washington. New research has confirmed that West Coast transient killer whales who live between ...