HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsSnailfishesThreadfin seasnail Threadfin seasnail (Rhodichthys regina) Scientific name: Rhodichthys regina Collett, 1879 The Threadfin seasnail (Rhodichthys regina) is a marine fish of the family Liparidae. Native range: Arctic to Northeast Atlantic, Central Arctic Basin, Norwegian and Greenland seas; including north of the Wyville-Thomson Ridge and the Iceland-Faroe Rise. Species factsScientific nameRhodichthys reginaFamilyLiparidae (Snailfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length31.0Depth range1080–2365 m (3543–7759 ft)EnvironmentMarine; bathydemersal; depth range 1080 - 2365 mClimateDeep-waterDistributionArctic to Northeast Atlantic: Central Arctic Basin, Norwegian and Greenland seas; including north of the Wyville-Thomson Ridge and the Iceland-Faroe Rise.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026