They often scavenge around for rotting food, both in the sea and on land. If land hermit crabs are kept in captivity the pet shop owner should advise of their food and upkeep needs. If hermit crabs that are live in the sea are to be kept, they need a properly set-up marine aquarium. Some hermit crabs that live in the sea, regularly give a lift to sea anemones and other animals on their shells. Sometimes a ragworm will live inside the snail shell with the hermit crab.
Hermit crab are very quarrelsome amongst themselves over the availability of snail shells.
However, the information on this page has been included because of public demand by the younger marine life watchers.