The veined octopus ( (Amphioctopus marginatus), also known as the coconut octopus, has a skill beyond other cephalopods: it hides under animal and coconut shell, which it drags along the seafloor for protection. This is one of the few examples — if not the only example — of tool use in invertebrates. Here, the octopus sits inside a vacant clam shell.It commonly preys upon shrimp, crabs, and clams, and displays unusual behaviour, including bipedal walking and gathering and using coconut shells and seashells for shelter.The coconut octopus is found on sandy bottoms in bays or lagoons. It frequently buries itself in the sand with only its eyes uncovered. Coconut octopus uses nut and clam shells for protection and will carry the shells with its inner suction cups while walking on the sea floor with the tips of its tentacles. When threatened, it will quickly close the shells around its body.
The Coconut octopus (Amphioctopus marginatus)