Hermit Crab

Description:

Hermit crabs have long, spirally curved abdomens, which are soft, unlike the hard, calcified abdomens seen in related crustaceans. The vulnerable abdomen is protected from predators by a salvaged empty seashell carried by this crustaceans, into which its whole body can retract. Most frequently, hermit crabs use the shells of sea snails. (Wikipedia)

Habitat:

Marine habitats all around the world. Although hermit crabs do venture into deeper waters,they are more commonly found in coastal waters where there is more food and places to hide. (A-Z Animals)