Scientists say they discovered that two well-known types of killer whales in the North Pacific Ocean are actually two separate species and not just different races. In a study published Wednesday, ...

Swimming deep in the Pacific Ocean, a group of little-known killer whales that eat large sea mammals including grey whale calves has been found, researchers say. Swimming deep in the Pacific Ocean, a ...

Learn how differences in diet and behavior split orcas off northern Japan into resident and transient groups — and what their ...

It’s World Orca Week (World Orca Day is July 14) so here’s a few things you may not know about the ocean’s top predator. Orcas, often referred to as killer whales, are a toothed whale but are ...

Amongst all the different killer whale populations around the world, there's only a couple that have been observed doing this ...