The mimic octopus, which lives in sandy habitats devoid of any shelter, even impersonates some of the ocean’s deadliest ...

The coconut octopus, or Amphioctopus marginatus ... and isn’t the only human-like behavior of this species. It has also been seen walking on two or four tentacles, using its remaining tentacles ...

Blanket octopus pairs are some of the undersea world ... Mating happens at arm’s length for the four species of these cephalopods. The tiny male detaches its hectocotylus—a modified arm ...