Orcas appear in Vancouver Harbour from time to time and often delight residents who catch a glimpse of them. But marine experts say three whales spotted there last week are unlike any previously ...

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

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.

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.

Marine experts are baffled by a series of “bloodthirsty” seal attacks on common dolphins along the British coast. Specialists believe that this shocking behaviour could be limited to a single killer ...

Orcas are among the ocean’s top predators, yet there is only one well-documented attack on a human in the wild: in 1972, a surfer was bitten – probably because he was mistaken for a seal – but ...

KILLER whales have broken into an all out cannibalistic civil war, scientists believe. Biologists have warned of an all-out ...