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

Researchers suggest that predation by a subspecies called Bigg's orcas might explain why members of another one, called ...

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

In 2022, a Russian whale researcher made a remarkable discovery on Bering Island off Russia's Pacific coast: a severed killer ...

Orcas don’t have any natural predators, so how did this happen? The tooth marks, it turned out, were distinctive – they were ...

Orcas appear in Vancouver Harbour from time to time and often delight residents who catch a glimpse of them. But marine ...

Scientists found evidence that killer whales may hunt and eat other killer whales, revealing new insights into how ...

(CNN) - An orca that made headlines when she swam about 1,000 miles with the body of her dead calf has given birth again. Researchers from the Center for Whale Research say Tahlequah, known as J35, ...

Word and photos of Vancouver’s mystery orcas reached marine biologist Emma Luck in Alaska. A year earlier, she had been alerted to a trio of mystery orcas in Turnagain Arm near Anchorage. Orcas are ...

Blue whale calves enter the world already the size of a bus, yet they still face danger. A hungry killer whale sees a slow, inexperienced target guarded by a single adult. However, orcas cannot reach ...

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