Some members of an octopus species hunt cooperatively in groups with fish, a new study found — an indication that some octopuses have richer social lives than scientists understood.

Octopuses and fish are routinely seen working together on the ocean floor, and now scientists say that the cephalopods are the leaders of the pack.

Mixed-species hunting packs comprised of octopuses and fish have been observed working together in the wild to improve predation success. It's been thought that the brainy octopuses would naturally lead the pack,