Hydractiniid hydroids [Hydractiniidae]

Description

Hydractiniidae, or hydractiniid hydroids, are a family of colonial hydrozoans that often encrust on shells inhabited by hermit crabs or other substrates. They play a significant role in marine ecosystems as both predators and prey, and their colonies can vary widely in appearance.

Genera

Hydractinia [Hydractinia]

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Podocoryna [Podocoryna]

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Podocoryne [Podocoryne]

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Stylactaria [Stylactaria]

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Taxonomy