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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.
The coconut crab (Birgus latro) is a terrestrial species of giant hermit crab, and is also known as the robber crab or palm thief. It is the largest terrestrial arthropod known, with a weight of up to 4.1 kg (9 lb). The distance from the tip of one leg to the tip of another can be as wide as 1 m (3 ft 3 in).
[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.
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]
The Acadian hermit crab, also known as Pagurus acadianus, can be found in the Western Atlantic Ocean, including areas such as the Vineyard Sound. [5] In addition, the Acadian hermit crab has been cited as the most abundant species of crab in Salisbury Cove, Maine by William C. Grant, Jr, during his extensive study of hermit crabs populating this area in 1961.
Its members are commonly called the 'symmetrical hermit crabs'. [2] They live in all the world's oceans, except the Arctic and the Antarctic , [ 2 ] at depths of 2,000 m (6,600 ft). [ 3 ] Due to their cryptic nature and relative scarcity, only around 60 specimens had been collected before 1987, when a monograph was published detailing a further ...
A Caribbean hermit crab in the Dry Tortugas National Park, Florida. The Caribbean hermit crab (Coenobita clypeatus), also known as the soldier crab, [2] West Atlantic crab, tree crab, or purple pincher (due to the distinctive purple claw), is a species of land hermit crab native to the west Atlantic, Belize, southern Florida, [3] Venezuela, and the West Indies.
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.