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

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

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

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”...

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

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

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

Orca whales (Orcinus orca) are among the most fearsome apex predators in the ocean. When not preying on the largest fish on Earth, they’re...

Orca whales (Orcinus orca) are among the most fearsome apex predators in the ocean. When not preying on the largest fish on Earth, they’re...