Hydractinia [Hydractinia]

Description

Hydractinia is a genus of colonial hydroids that are commonly found growing on snail shells inhabited by hermit crabs and other substrates in shallow waters. These organisms form a network of stolons from which individual polyps emerge. The polyps are specialized for different functions, including feeding, reproduction, and defense. Hydractinia species are characterized by their symbiotic relationships with various marine animals, their ability to regenerate, and their complex colonial structure.

Species

Snail fur [Hydractinia echinata]

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Southern hydractinia [Hydractinia southwardorum]

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Hydractinia milleri [Hydractinia milleri]

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Hydractinia symbiolongicarpus [Hydractinia symbiolongicarpus]

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Taxonomy