In a new sign of toolmaking in marine mammals, orcas in the Pacific Northwest were recorded rubbing stalks of kelp against each other’s bodies, a study shows.

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 using a new drone say they have observed killer whales finding and modifying stalks of kelp to preen each other.

Rare Kelp Gull spotted on Milwaukee's lakefront, a first for Wisconsin The bird is typically found in South America, New Zealand and even Australia.

Researchers say higher quality drones helped them spot the whales regularly breaking off pieces of kelp to use as a tool, pressed between their bodies.

Killer whales have joined the rare club of animals that can make and use tools, for the first time being observed crafting a kind of brush out of kelp and then using it on fellow pod members.

For the first time, orcas have been seen making and using tools out of seaweed. The reason? Most likely as a form of social grooming.

In the first known toolmaking by a marine mammal, southern residents have been documented detaching lengths of seaweed and using them to massage each other.

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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.

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 ...

Orcas were spotted using kelp as a grooming tool on each other, the first known use of tools among cetaceans for something other than hunting prey.