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2. Paguristes puncticeps - Wikipedia

   en.wikipedia.org/wiki/Paguristes_puncticeps

   The midden constitutes a source of empty shells available for use by hermit crabs, and P. puncticeps individuals have been observed carrying empty shells away from the pile. [4] The middens also attract hermit crabs which feed on food scraps left by the octopus, but feeding close to the octopus den is a risky business.

3. Hermit crab - Wikipedia

   en.wikipedia.org/wiki/Hermit_crab

   Hermit crabs fighting over a shell A hermit crab retracted into a shell of Acanthina punctulata and using its claws to block the entrance. As hermit crabs grow, they require larger shells. Since suitable intact gastropod shells are sometimes a limited resource, competition often occurs between hermit crabs for shells. The availability of empty ...

4. Calcinus tubularis - Wikipedia

   en.wikipedia.org/wiki/Calcinus_tubularis

   It is one of only two species of hermit crab (the other being the closely related C. verrilli) in which sexual dimorphism in shell use has been observed. [ 7 ] [ 8 ] Males inhabit gastropod shells , chiefly those of Pisania maculosa or Cerithium vulgatum , [ 5 ] which they can move freely; females occupy the fixed tubes made by the vermetid ...

5. Calcinus verrillii - Wikipedia

   en.wikipedia.org/wiki/Calcinus_verrillii

   Calcinus verrillii, commonly known as Verrill's hermit crab, is a species of hermit crab in the genus Calcinus which is endemic to Bermuda.It was first described by the American zoologist Mary J. Rathbun and named in honour of the American zoologist Addison Emery Verrill, who spent much time with his students studying the geology and marine fauna of Bermuda.

6. Turbo (gastropod) - Wikipedia

   en.wikipedia.org/wiki/Turbo_(gastropod)

   When the Caribbean hermit crab, Coenobita clypeatus, or "purple pincher" as it is known in the pet trade is kept as a house pet, Turbo shells are a favorite choice of shells for the crab. Turbo cornutus , common name the "horned turban", is an expensive food item in Korea, and Japan, where they are known as sazae .

7. Calcinus elegans - Wikipedia

   en.wikipedia.org/wiki/Calcinus_elegans

   The shells of hermit crabs, primarily composed of calcium carbonate, are easily susceptible to a decline in pH. Low pH environments degrade calcium carbonate rapidly, creating a large amount of structural instability within the hermit crab’s primary defense system. Without proper protection from sturdy shells and a decline in the number of ...