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Like a proud cat leaving a bird on its owner's doorstep, orcas—also called killer whales—may sometimes offer to share their ...

A study published in the journal Current Biology describes a new example of tool use by a critically endangered population of ...

A new study reveals killer whales fashion kelp into tools and use them to groom each other, a possible first for marine ...

Dubbed "allokelping," it might be a unique cultural phenomenon that's as endangered as the orca population itself ...

The whales use quick body movements to tear pieces of bull kelp for use as tools, perhaps the first known toolmaking by a marine mammal.

Researchers have observed a population of orcas that cut and position kelp tools between their bodies to scrub each other’s ...

Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans. Here's what they think is going on. Pacific white-sided dolphins swim ...

Lobster fishermen in northern Cape Breton got an up-close glimpse of a pod of killer whales this week, a sighting that a marine biologist says is on the rise.Bernie Lamey was hauling lobster traps on ...

Orca whales have been spotted off the coast of Cape Breton this week. Lobster fisherman Bernie Lamey told CBC that this is the first time he's ever seen a pod of killer whales in the area.

A massive killer whale swam deep into Yaquina Bay, hunting alone and stunning onlookers. Here's what we know about T049C — and why he's so well known.