Coconut octopus during night, body protected by two clam shells attached by suction cups. Coconut moves along with its clamshell housing using tentacles like legs. Stops and retreats inside the shell.

Coconut Octopus Hiding in Shells The coconut octopus is one of the few invertebrate species documented to use tools. They don’t just hide in shells; they collect and carry them, demonstrating complex planning and high cognitive function. They often select two halves of a clam or coconut shell, positioning one underneath them and holding the other above. When a predator approaches, they pull the two halves together, creating a nearly impenetrable, rolling shelter they can deploy instantly. Filmed