Key Identification Features
- Three distinct types of polyps grow among these spines.
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Hydractiniidae is a animal family in the Animalia kingdom, order Anthoathecata, class Hydrozoa. The family contains 2 accepted species worldwide.
For instant identification in the field, use the iNature app — AI-powered, works offline.
Schuchertinia milleri (Torrey, 1902)
Schuchertinia milleri is a northeastern Pacific hydroid that often forms a symbi…
Hydractinia echinata (Fleming, 1828)
Hydractinia echinata is a hydroid that grows on hermit crab-occupied shells, fou…
Hydractiniidae animals belong to the Anthoathecata order in the Animalia kingdom. Three distinct types of polyps grow among these spines. For instant identification, use the iNature app — AI-powered and works offline.
Hydractiniidae is classified in the order Anthoathecata, class Hydrozoa, phylum Cnidaria. The family contains 2 accepted species worldwide.
Sources: GBIF, iNaturalist, Wikipedia · Disclaimer
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