Amphioctopus marginatus (Coconut Octopus)

Amphioctopus marginatus (known as the coconut octopus or veined octopus) is a species of octopus that is known for dragging shells (including nut and bivalve shells) for shelter and protection. They live in tropical waters of the western Pacific Ocean, and can be found in the sandy bottoms of bays and lagoons. The main reason of how they collect these shells, thus of commonly hunting and eating shrimp, crabs, and clams.

The main part of the body (head, etc.) is usually (for a full grown coconut octopus) about 3 inches long, while it is in hole 6 inches long, including the tentacles.