New research confirms two distinct groups of West Coast killer whales with different diets, habitats, and behaviors.

Orcas in the Gulf of California were spotted attacking great white sharks using a unique hunting strategy: A body slam and liver eating.

In Mexico’s Gulf of California, scientists captured rare footage of a group of orcas called Moctezuma’s pod hunting young ...

Amid challenges like dwindling salmon, noise pollution and climate change, the Pacific Northwest is wrestling with how to ...

Almost the entire population of southern resident killer whales gathered in central Puget Sound on Sunday, but the newest ...

Seven minutes into the video, the whales attacked a second juvenile white shark. This one was worked over repeatedly until ...

Two orcas have been left behind in an abandoned marine park in France and now the devastating truth of why they can't be ...

Animal rights advocates have warned that 'time is running out' for orcas Wikie and Keijo, who remain trapped at France's now-defunct Marineland of Antibes.

The team films something not seen before: an hours-long teaching session between adults and their young. Killer whales are one of only a handful of animals that actively teach their young, and it’s ...

LĀNA‘I, Hawai‘i (Island News) -- A heartbreaking discovery off Lāna‘i this week. Researchers with Cascadia Research Collective found an endangered false killer whale severely entangled in marine ...

In another wild instance of orcas attacking ships, three orcas were filmed off the coast of Lisbon, Portugal, going full send on a small boat until the rudder was detached and the vessel started to ...

A group of killer whales were spotted off the coast of California, boaters said. Getty Images/iStockphoto A group of orcas was spotted off the coast of California, leaving boaters “thrilled,” ...