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A hermit crab emerges from its shell, Coenobita perlatus Outside its shell, the soft, curved abdomen of hermit crabs, such as Pagurus bernhardus, is vulnerable. Hermit crab species range in size and shape, from species only a few millimeters long to Coenobita brevimanus (Indos Crab), which can approach the size of a coconut and live 12–70 years.
This species is one of the two land hermit crabs commonly sold in the United States as pets, the other being the Ecuadorian hermit crab. [4] [8] C. clypeatus has been confirmed to live as long as 12 years, [9] and some crab owners have claimed to have crabs live up to 40 years. [10]
Clibanarius digueti is a species of hermit crab that lives off the western coast of Mexico, and is abundant in the Gulf of California. [1] It is known under various common names such as the Mexican hermit crab, the blue-eyed spotted hermit [2] or the Gulf of California hermit crab. [3]
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] In smaller individuals, the bands may be white. [2]
[3] [7] Hermit crab shells are crucial for protection and minimizing predation, and therefore proper shell selection is vital. P. longicarpus will avoid selecting shells with extensive damage because they are more vulnerable to predation. The most common type of damage to hermit crab shells is the presence of small holes.
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).
During the day the crabs move slowly or rest, feeding usually begins in dusk and continuous until through the night. They usually congregate in rocky areas with 30cm of water. Members of the same group usually move in one general direction when feeding, think of a group of grazing cattle. By 4:30 in the morning they are back to their congregation.
Pagurus is a genus of hermit crabs in the family Paguridae.Like other hermit crabs, their abdomen is not calcified and they use snail shells as protection. These marine decapod crustaceans are omnivorous, but mostly prey on small animals and scavenge carrion.