Detached orca fins scored with distinctive tooth marks suggest that killer whale cannibalism is happening — and it might explain some complex orca societies.

The possible sighting of a calf among a pair of female orcas off the Isles of Scilly has sparked excitement among marine wildlife experts. The Isles of Scilly Wildlife Trust said boatman Joe Pender ...

A rare pod of orcas, known as CA-51, has returned to Monterey Bay after a three-year hiatus, delighting whale watchers and ...

Rare J Pod sighting draws attention as endangered orcas pass Tacoma with calf Orca Network confirms early migration linked to salmon availability in region Officials urge minimal boat noise to avoid ...

A pygmy sperm whale was attacked by a pod of orcas off the coast of Madeira. Orcas preying on marine mammals are rarely seen in the region. Camila Dávila Pardo/ Blue Safari Madeira As the whale ...

Two groups of killer whales are engaging in a terrifying, bloody cannibalistic war beneath the ocean’s surface, where gangs ...

Multiple killer whales were spotted circling and feasting on a blue shark in a dramatic open-ocean encounter. The footage ...

(CNN) — A pod of Pacific white-sided dolphins off the coast of British Columbia have been observed cooperating with orcas, a traditional enemy that’s better known for taking out great white sharks ...