Over time, that name morphed into "killer whales." Scientists don't know whether orcas kill for fun. The marine mammals do some things, like killing and tossing dead porpoises in the air ...

Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton ...

Recent findings used wildlife forensics and citizen science data to provide the first confirmed evidence of killer whale ...

The recent autopsy of a partially devoured great white shark confirms a brutal hunting trend—killer whales around the world are not afraid to attack the fearsome fish, especially when they get a ...

Orcas, or killer whales, also adopted a bizarre behavior during this time that could only be described as a fad—balancing dead salmon on their heads like aquatic hats. Just as quickly as this ...

The pod of killer whales that showed up Thursday, Jan. 30, have only been documented less than 10 times since 1993.

Pack-ice killer whales are highly social creatures, communicating through various vocalizations like pulsed calls and whistles. For the first time, researchers have recorded these vocalizations and ...

Orcas, or killer whales, are deadly and beautiful apex predators.

Orcas, also called killer whales, are apex predators of the ocean. Their intelligence, hunting skills, and sheer power make ...

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...