''Hydractinia'' is a genus of commensal athecate hydroids which belong to the family

Hydractiniidae Hydractiniidae is a cnidarian family of athecate hydroids Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long-known, heavily di ...

. ''Hydractinia'' species mostly live on hermit-crabbed marine gastropod shells. One species, ''

Hydractinia echinata ''Hydractinia echinata'' is a colonial marine hydroid which is often found growing on dead, hermit-crabbed shells of marine gastropod species. This hydroid species is also commonly known as snail fur, a name which refers to the furry appearance ...

'', is commonly known as snail fur. Another species, ''H. minoi'', is known to be commensal with stingfishes of the genus '' Minous''.

Species

References

''Hydractinia''
at

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialis ...

Hydractiniidae Hydrozoan genera {{anthoathecata-stub