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

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This stingray gets knocked out cold by an orca tail slap - take a look and read our analysis of orca hunting behavior.

Historically, killer whale diet research relied on surface sampling of prey fragments, usually scales, helping researchers to determine primarily salmon species. Newer techniques that analyze DNA in ...

Two severed fins bearing the tooth marks of other killer whales have raised a troubling question: are some orcas hunting ...

The discovery came as a surprise, because the two species usually prefer to avoid each other and keep a safe distance.

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

KILLER whales have broken into an all out cannibalistic civil war, scientists believe. Biologists have warned of an all-out orca-on-orca battle being fought in the North Pacific where one deadly ...

A pod of seven killer whales was spotted in Algoa Bay, marking a rare local sighting. Experts confirm the group is a known pod that frequents South Africa’s south coast, highlighting both the region’s ...

Biologists have seen signs of orca-on-orca predation in the North Pacific, and such cannibalism may explain why some orcas travel in large family groups. Two distinct subspecies of orcas, also called ...

Fish-eating killer whales in southern Alaska have a diverse, seasonally changing diet featuring salmon and groundfish, according to a published study in the journal Ecosphere. The types of fish ...

This article was originally published on The Conversation, an independent and nonprofit source of news, analysis and commentary from academic experts. Disclosure information is available on the ...