Hermit Octopus / CryptoMenagerie

Commonly it is crustaceans that are found using abandoned shells for protection from predators. These cephalopods have adopted the same strategy and can be seen to hold the shell on their heads with two tentacles leaving the other six for walking and eating. Typically one tentacle is held in front of the shell opening so it can grab any food items while the others to grip onto the floor — via Etsy