Dolphins

First of its kind footage captures the moment an orca mom and her son drown a calf in an extremely rare case of infanticide.

The highly desiccated remains of a suspected bottlenose dolphin were recently found on a beach in South Carolina after "mummifying" for weeks or even months. One expert believes the animal may have deliberately beached itself.

Bottlenose dolphins have been observed trying to kill Antillean manatee calves, and researchers don't fully understand what's going on.

A dolphin with deformed flippers that look like thumbs was spotted in the Gulf of Corinth in July 2023. It likely acquired what appears to be a genetic defect during development in the womb, experts say.

An orca's final moments may have been captured on film for the first time, after repeated attempts by two young orcas to keep the old, dying male at the surface so he could breathe.

Dolphins in Koombana Bay, Western Australia, have learned how to raid crab pots being used for bait and remove the hooks, footage has revealed.

For the fourth time in two years, a group of unusually brazen orcas in southwestern Europe have sunk a sailing boat after relentlessly attacking it for almost an hour on Halloween.

A megapod of dolphins with thousands of individuals has been captured on video hunting flying fish off the coast of Costa Rica.

Orcas have their own dialect, greeting ceremonies and even wore salmon as hats in a weird fad during the 1980s.

From sinking boats and feasting on shark livers to dining on whale tongue and tossing porpoises around for fun, orcas are displaying some fascinating — and sometimes terrifying — behaviors.