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Calcinus guamensis is a small hermit crab with a maximum shell width of about 6 mm (0.24 in). It is easily recognized by its coloration of a mustard brown or olive that fades into white, with its walking legs dipped in black. [5] Its uneven claws, with the left being significantly larger, are bluish-green and differ from its reddish-brown body.
Further, like many pets, hermit crabs need enrichment and need opportunities for hiding and climbing. Huts, wood, and artificial plants can be used to fill this need. [45] In the wild hermit crabs may walk several miles a night for purposes of foraging or migration. [46] Hermit crabs are nocturnal and are most active during the night. [43]
Walking legs banded black and white, claws light or dark gray. [4] This species is a small to medium sized hermit, growing up to 2 in (51 mm) in size. It is omnivorous, feeding on a variety of plant and animal matter. [3] This crab exhibits phototaxis, possibly as a strategy to avoid predators. [5] In Poipu, Hawaii
P. armatus is one of the largest species of hermit crab: [3] adults may reach a carapace length of 43 mm (1.7 in). [6] The legs, including the claws, have bands of colour, in red, orange and white, and the claws bear short spines on the dorsal surface. [6] The eyestalks are short, but bear large black compound eyes. [6]
Pagurus samuelis is a small hermit crab, at up to a total length of 40 mm (1.6 in) and a carapace width of up to 19 mm (0.75 in). [2] The base colour of the exoskeleton is brown or green, [2] but the antennae are red, and adults have bright blue bands near the tips of their legs. [3]
Coenobita brevimanus is a species of terrestrial hermit crab belonging to the family Coenobitidae, which is composed of coastal living terrestrial hermit crabs. From there it belongs to the genus Coenobita , one of two genera split from the family, which contains sixteen species.
The carapace is armed with dorsal spines and is more heavily calcified than is the case in most hermit crabs. The walking legs are relatively long and the crab "wears" a mollusc shell that appears to be too small. The crab's body and legs are brown or pinkish and have a reddish iridescent sheen. [5]
Pagurus hirsutiusculus is a species of hermit crab, commonly called the hairy hermit crab. It lives from the Bering Strait south to California and Japan , from the intertidal zone to a depth of 110 m (360 ft).