First observed in the 1980s, the fad of orcas swimming around with dead salmon on their foreheads off Washington State seemed to have faded—until now. An orca from the southern resident population off ...

Hunting killer whales always eat the animals they kill, typically leaving behind only a few low-energy parts, such as fins. "Also, if it was just aggression, they wouldn't bother to tear off the fin," ...

Only two places in the world allow tourists to enter the water with the ocean’s apex predator. But the safety of both species is a growing concern. An orca near the shoreline of Baja California Sur, ...

Orca fins washing up in the North Pacific are scratched with characteristic tooth marks that suggest killer whales are occasionally cannibals. Scientists say this may explain why some orcas live in ...