Breeding this species in captivity is facilitated by housing them in a relatively small enclosure well-decorated with little "caves" such as snail shells in which they can breed.
It contains several brown or black seeds which are often shaped like a kidney or a snail shell.
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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.
It uses large gastropod shells, such as those of Tonna galea and Charonia species, which it often decorates with one or more sea anemones of the species Calliactis parasitica.
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda.