Orcas may be teaching others to attack boats following a spate of killer whale strikes on sailboats off the coast of Europe, some observers say.

A group of orcas was spotted off the coast of California, leaving boaters “thrilled,” passengers said. On Aug. 26, eight to ...

An orca that became stranded on a rocky beach in Alaska was freed with the help of the National Oceanic and Atmospheric Administration (NOAA) and sailors who happened to be nearby.

A new study found that a killer whale pod in Mexico is attacking much larger whale sharks from below to debilitate them. This "sniper" hunting strategy appears to be an organized attack, according ...

The Atlantic White Shark Conservancy confirmed it was a sighting of Old Thom, the only orca regularly seen in North Atlantic ...