This is a predominantly Arctic species for which most of the records come from Spitsbergen. The colonies of Hydractinia carica grow on marine snails of the genus Buccinum, but unlike other Hydractinia species they seem to be associated with the living snails and are not present when the shell is inhabited by hermit crabs. The combination of their preferred substrate, smooth small conical spines, and gonozooids without tentacles helps to distinguish this species from other Arctic hydractiniids.
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Lara Beckmann
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Joan J. Soto-Àngel
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Aino Hosia
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Luis Martell
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Universitetsmuseet i Bergen, Universitetet i Bergen
