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

Drone footage has captured killer whales breaking off stalks of kelp and rubbing the pieces on other orcas, a rare case of tool use in marine animals ...

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Orcas have been spotted giving each other rubdowns with kelp tools, rubbing pieces of the seaweed between their bodies.