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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.
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Dardanus pedunculatus, commonly referred to as the anemone hermit crab, is a species of hermit crab from the Indo-Pacific region. It lives at depths of up to 27 m and collects sea anemones to place on its shell for defence.
The brown stripe and bands are still present in the adult crabs. They are darker than most other species of its genus. [1] They have an abdominal lung and extremely reduced gills due to their terrestrial lifestyle. [2] They also have a disproportionately large dark purple pincher and long black eye stalks which they can easily be identified by.
This land hermit crab lives in mangrove trees, are mainly nocturnal, and terrestrial species, however often prefer salt water inside of its shell. [4] The larger hermit crabs have been known to submerge their entire bodies into the sea water. The saltwater is used to bind the shell to the crabs back through the high salinity in the water. [6]
The Coenobitidae are the family of terrestrial hermit crabs, widely known for their land-living habits as adults. They are found in coastal tropical regions around the world and require access to the ocean to breed. Although coenobitids are fully terrestrial as adults, they spend their marine life as planktonic larvae.
Like other hermit crabs, they cannot make their own shells and instead they most often live in discarded snail shells. [9] Multiple Redleg calcinus have been observed sharing a single shell. [10] They are nocturnal scavengers. [2] As detritus feeders they consume mainly decaying organic matter. [11]
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 ...