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They can be found along the mainland coasts of Alaska and the Bering and Chukchi seas. Unlike other pinnipeds, walruses mate during the winter in the water and give birth on ice floes in springtime.

Orcas have long been revered for their intelligence, adaptability, and group-hunting strategies. But one scientific review ...

Researchers have identified a fascinating behavior in killer whales, aka orcas: they sometimes offer to share their prey with ...

In a baffling show of generosity, killer whales across the globe are giving fish to humans—and scientists are racing to ...

Killer whales off the west coast of North America have been spotted making and using tools to groom each other, the first time such behaviour has been recorded in marine mammals.

Killer whales have been caught on video breaking off pieces of seaweed to rub and groom each other, scientists announced Monday, in what they said is the first evidence of ...

Killer whales have been caught on video breaking off pieces of seaweed to rub and groom each other, scientists announced Monday, in what they said is the first evidence of marine mammals making ...

Killer whales turn kelp stalks into tools that they use to groom each other while cleaning their own skin, too, observations suggest. Michael Weiss at the Center for Whale Research in Friday ...

Scientists have spotted a subset of killer whales using seaweed to scratch each other’s backs, marking the first known identification of “tool” usage by marine mammals. The “southern ...

Killer whales "groom" each other using tools made from seaweed, reveals new research. The "incredibly exciting" discovery is a very rare example of tool use by marine species, say American ...