, the long-armed hermit crab, is a small western Atlantic hermit crab. It belongs to the genus Pagurus
, all members of which have unequal chelipeds (claws) in which the right is substantially larger than the left. In the case of P. longicarpus
, the oversized claw is long and slender and approximately cylindrical in shape. Body color is highly variable, ranging from beige to off-white to greenish-grey to brown (Voss 1983, Rupert and Fox 1988).Like all hermits, P. longicarpus
protects its soft, assymetrical abdomen by tucking it into and tightly curling it around the columella of the shell from a dead gastropod (Barnes 1987).