Hydractinia

Hydractinia
Hydractinia altispina
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Hydrozoa
Order:	Anthoathecata
Family:	Hydractiniidae
Genus:	Hydractinia van Beneden, 1841
Species
See text
Synonyms
List Cionistes Wright, 1861 Echinochorium Hassall, 1841 Euhydractinia Broch, 1910 Halorhiza Stechow, 1962 Hydrodendrium Nutting, 1906 Hydronema Stechow, 1921 Nuttingia Stechow, 1909 Podocorella Stechow, 1921 Synhydra Quatrefages, 1843

Hydractinia is a genus of commensal athecate hydroids which belong to the family Hydractiniidae. Hydractinia species mostly live on hermit-crabbed marine gastropod shells.

One species, Hydractinia echinata, is commonly known as snail fur.[1] Another species, H. minoi, is known to be commensal with stingfishes of the genus Minous.[2]

Species

H. aculeata H. aggregata H. altispina H. anechinata H. angusta H. apicata H. arctica H. arge H. armata H. bayeri H. betkensis H. brachyurae H. californica H. canalifera H. carica H. carolinae H. constrictura

H. cryptogonia H. cytaeiformis H. denhami H. diogenes H. disjuncta H. dongshanensis H. echinata H. epidocleensis H. epispongia H. gorgonoides H. granulata H. guangxiensis H. hancocki H. inabai H. ingolfi H. kaffraria H. laevispina

H. longispina H. mar H. marsupialia H. michaelseni H. minoi H. moniliformis H. monocarpa H. monoon H. multispina H. multitentaculata H. munita H. nagaoensis H. novaezelandiae H. ocellata H. otagoensis H. pacifica H. parvispina H. paucispinata H. phialiformis H. phyllosoma H. piscicola H. polycarpa

H. polyclina H. polytentaculata H. proboscidea H. prolifica H. promiscua H. quadrigemina H. recurvatus H. rugosa H. sandrae H. sarsii H. spinipapillaris H. spiralis H. symbiolongicarpus H. symbiopollicaris H. taiwanensis H. thatcheri H. uniformis H. valens H. vallini H. verdi H. yerii

References

1. Kåre Telnes. "Snail Fur - Hydractinia echinata". The Marine Flora and Fauna of Norway. Kåre Telnes. Retrieved 1 April 2022.
2. Eschmeyer, W. N.; Hallacher, L. E.; and Rama-Rao, K. V. (1979). "The scorpionfish genus Minous (Scorpaenidae, Monoinae) including a new species from the Indian Ocean". Proceedings of the California Academy of Sciences. 41 (20): 453–473.

• Hydractinia at World Register of Marine Species