Fish Identification

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Non-fish Identification: Find Species

Family: Hydractiniidae (See list of species below)

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Total number of spines in dorsal and anal fins (optional)

54 species with fin ray counts including ? spines in dorsal and ? in anal fins (see list below)

No picture found Clava multicornis [Club hydroid]	No picture found Cordylophora caspia [Freshwater hydroid]	No picture found Corydendrium fruticosum []
No picture found Corydendrium parasiticum []	No picture found Hydractinia aculeata []	No picture found Hydractinia aggregata []
No picture found Hydractinia americana []	No picture found Hydractinia angusta []	No picture found Hydractinia antonii []
No picture found Hydractinia arge []	No picture found Hydractinia armata []	No picture found Hydractinia californica []
No picture found Hydractinia carica []	No picture found Hydractinia carolinae []	No picture found Hydractinia dendritica []
No picture found Hydractinia dubia []	Hydractinia echinata [Snailfur]	No picture found Hydractinia fucicola []
No picture found Hydractinia laevispina []	No picture found Hydractinia leizhouensis []	No picture found Hydractinia milleri [Miller hydractinia]
No picture found Hydractinia minima []	No picture found Hydractinia minuta []	No picture found Hydractinia monocarpa []
No picture found Hydractinia pacifica [White bottlebrush hydroid]	No picture found Hydractinia parvispina []	No picture found Hydractinia polycarpa []
No picture found Hydractinia polyclina []	No picture found Hydractinia selena []	No picture found Hydractinia symbiolongicarpus []
No picture found Hydractinia symbiopollicaris []	No picture found Hydractinia valens []	No picture found Janaria mirabilis []
No picture found Merona cornucopiae []	No picture found Merona laxa []	Oceania armata []
No picture found Podocoryna borealis []	No picture found Podocoryna carnea [Smoothspined snailfur]	No picture found Podocoryne apicata []
No picture found Podocoryne minima []	No picture found Podocoryne ocellata []	No picture found Podocoryne simplex []
No picture found Rhizodendrium sterreri []	No picture found Rhizogeton ezoense []	No picture found Rhizogeton fusiformis []
No picture found Rhizogeton nematophorum []	No picture found Rhizogeton nudum []	No picture found Schuchertinia allmanii []
No picture found Stylactaria hooperii []	No picture found Tubiclava rubra []	No picture found Turritopsis dohrnii []
No picture found Turritopsis fascicularis []	No picture found Turritopsis lata []	No picture found Turritopsis nutricula [Immortal jellyfish]

54 Species of Family Hydractiniidae
()

Sort by: Species Length

Scientific Name	English Name	Distribution	Max. Length (cm)
Clava multicornis	Club hydroid	Atlantic, Arctic Oceans a
Cordylophora caspia	Freshwater hydroid	Cosmopolitan.
Corydendrium fruticosum		Eastern Pacific
Corydendrium parasiticum		Southeast Pacific and Atl
Hydractinia aculeata		Mediterranean
Hydractinia aggregata		Eastern Pacific
Hydractinia americana		Atlantic and Pacific Ocea
Hydractinia angusta		Antarctic Pacific
Hydractinia antonii		Northwest Pacific
Hydractinia arge		Western Atlantic.
Hydractinia armata		Eastern Pacific
Hydractinia californica		Eastern Pacific
Hydractinia carica		Northern Atlantic, Northw
Hydractinia carolinae		Western Atlantic
Hydractinia dendritica		Antarctic
Hydractinia dubia		Western Atlantic
Hydractinia echinata	Snailfur	Atlantic Ocean and the Me
Hydractinia fucicola		Mediterranean
Hydractinia laevispina		Northwest Atlantic, Easte
Hydractinia leizhouensis		Northwest Pacific
Hydractinia milleri	Miller hydractinia	Eastern Pacific	2.5 H
Hydractinia minima		Western Atlantic and the
Hydractinia minuta		Western Atlantic, Caribbe
Hydractinia monocarpa		Atlantic Ocean, Northwest
Hydractinia pacifica	White bottlebrush hydroid	Southeast Pacific
Hydractinia parvispina		Antarctic Atlantic
Hydractinia polycarpa		Eastern Pacific
Hydractinia polyclina		Western Atlantic
Hydractinia selena		Western Atlantic
Hydractinia symbiolongicarpus		Western Atlantic
Hydractinia symbiopollicaris		Western Atlantic
Hydractinia valens		Western Atlantic
Janaria mirabilis		Eastern Pacific
Merona cornucopiae		Atlantic Ocean
Merona laxa		Eastern Pacific
Oceania armata		Southwest Pacific, Wester	1 WD
Podocoryna borealis		Southeast Pacific, Atlant
Podocoryna carnea	Smoothspined snailfur	Pacific Ocean, Atlantic O
Podocoryne apicata		Northwest Pacific
Podocoryne minima		Northwest Pacific
Podocoryne ocellata		Western Central Atlantic
Podocoryne simplex		Northwest Pacific
Rhizodendrium sterreri		Western Atlantic
Rhizogeton ezoense		Pacific Ocean
Rhizogeton fusiformis		Western Atlantic
Rhizogeton nematophorum		Eastern Pacific
Rhizogeton nudum		Northern Atlantic and Arc
Schuchertinia allmanii		Arctic
Stylactaria hooperii		Southwest Atlantic
Tubiclava rubra		Eastern Indian Ocean and
Turritopsis dohrnii		Mediterranean
Turritopsis fascicularis		Western Atlantic. Tropic
Turritopsis lata		Southwest Pacific	0.3 WD
Turritopsis nutricula	Immortal jellyfish	Atlantic, Caribbean and I	0.5 WD

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