The halloween hermit crab, also known as the striped hermit crab or orange-legged hermit crab, is a brightly colored aquatic hermit crab of the family Diogenidae. Besides its ability to routinely clean algae in aquaria, the halloween hermit crab's festive striped coloration also appeals to enthusiasts; it is considered the most brightly colored hermit crab in normal aquarium use.
The Diogenidae are a family of hermit crabs, sometimes known as "left-handed hermit crabs" because in contrast to most other hermit crabs, its left chela (claw) is enlarged instead of the right. It comprises 429 extant species, and a further 46 extinct species, making it the second-largest family of marine hermit crabs, after the Paguridae.
Calcinus is a genus of hermit crabs in the family Diogenidae, containing the following species:
Clibanarius fonticola is the only species of hermit crab in the world that lives in fresh water. It is found on the island of Espiritu Santo, Vanuatu. While a number of other hermit crabs are terrestrial or live in estuarine habitats, C. fonticola is the only species that spends its life in fresh water. It lives in a pool fed by springs near the village of Matevulu, close to an abandoned airstrip. The adult hermit crabs of this species all use shells of Clithon corona.
Ciliopagurus albatrossi is a species of hermit crab native to the Hawaiian region.
Ciliopagurus alcocki is a species of hermit crab native to New Caledonia.
Ciliopagurus babai is a species of hermit crab native to Wakayama.
Ciliopagurus haigae is a species of hermit crab native to Tanzania.
Ciliopagurus liui is a species of hermit crab native to the Gulf of Tonkin and waters to the south of Japan.
Ciliopagurus major is a species of hermit crab native to French Polynesia.
Ciliopagurus pacificus is a species of hermit crab native to French Polynesia.
Ciliopagurus tricolor is a species of hermit crab native to Madagascar. It is one of four species in the "strigatus complex", having morphological similarities to C. strigatus, with the most prominent variance being coloration.
Ciliopagurus caparti is a species of hermit crab native to South East Atlantic.
Ciliopagurus galzini is a species of hermit crab. It is one of four species in the "strigatus complex"; it resembles C. strigatus, with the most prominent difference being coloration. It is common in the shallow intertidal waters of the Tuamotus.
Ciliopagurus krempfi is a species of hermit crab from the Indo-Pacific.
Ciliopagurus substriatiformis was a species of hermit crab that existed during the Badenian stage.
Ciliopagurus tenebrarum is a species of hermit crab native to Cape Comorin.
Ciliopagurus vakovako is a species of hermit crab native to the Marquesas Islands. It is typically found at a depth no lower than 57 metres (187 ft). C. vakovako appears to be a vicariant of C. strigatus, a species widespread throughout the Indo-pacific region.
Calcinus tubularis is a species of hermit crab. It is found in the Mediterranean Sea and around islands in the Atlantic Ocean, where it lives below the intertidal zone. Its carapace, eyestalks and claws are marked with numerous red spots. C. tubularis and its sister species, C. verrilli, are the only hermit crabs known to show sexual dimorphism in shell choice, with males using normal marine gastropod shells, while females use shells of gastropods in the family Vermetidae, which are attached to rocks or other hard substrates.
Aniculus maximus, the "hairy yellow hermit crab" or "large hairy hermit crab", is an aquatic hermit crab of the family Diogenidae.
