A hermit crab is a decapod crustacean. The land hermit crab belongs to the family Coenobitidae which consists of two species: Birgus latro and Coenobita.

The term decapod means 10 legs. Only 3 pairs of appendages are visible when the hermit crab is in the shell. The smaller appendages are used to hold the shell and for grooming.

Ready to learn more? Section One of The Complete Guide to Land Hermit Crabs and Their Care includes a detailed look at hermit crabs.