Police responded to an unusual call when a pilot whale calf was found stranded on the beach in Florida. It happened on Monday ...

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

In the North Pacific, orca fins with signs of cannibalism are washing up on a Russian beach. The findings suggest that killer whales occasionally participate in cannibalism, which might explain why ...

Common names for animals are often easier to remember than their Latin names, but they can often lead to confusion. Here are ...

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

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

A new study shows that as humpback whale populations recover from past whaling, older males are gaining a major advantage in reproduction. Early in the recovery, breeding groups were dominated by ...

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 ...

The dinosaur era was full of scary animals. These animals possessed enormous power and were very big. They roamed the earth, ...

New Canadian-led research into northern resident killer whales suggests even when food is plentiful, orca moms struggle to regain body fat when they have more living offspring.