Killer whales in the North Pacific have been seen grooming each other - rubbing pieces of kelp between their bodies.

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

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

Behavior in orca population off coast of US and Canada captured by scientists using drone observation

Orcas have been filmed using kelp as a tool to massage each other ......

Orcas have been filmed using kelp as a tool to massage each other ......

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

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

Scientists filmed orcas using seaweed to groom each other, showing tool use.

Scientists filmed orcas using seaweed to groom each other, showing tool use.