HomeFish encyclopediaChimaerasChimaerasShortnose chimaeras or ratfishesSmalleyed rabbitfish Smalleyed rabbitfish (Hydrolagus affinis) Scientific name: Hydrolagus affinis de Brito Capello, 1868 Photo: http://archive.serpentproject.com/966/ The Smalleyed rabbitfish (Hydrolagus affinis) is a marine fish of the family Chimaeridae. BiologyLacks a separate anal fin. Pectoral fin does not overlap pelvic fin. Short caudal filament. Dark brown in color.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHydrolagus affinisFamilyChimaeridae (Shortnose chimaeras or ratfishes)OrderChimaeriformes (Chimaeras)ClassHolocephali (Chimaeras)Maximum length130Depth range300–3000 m (984–9843 ft)EnvironmentMarine; bathydemersal; depth range 300 - 3000 mClimateDeep-waterDistributionNortheast Atlantic: Rockall Trough along Ireland, northern Bay of Biscay and off Portugal. Reported from Iceland. Southwest Atlantic: Uruguay. Northwest Atlantic: Newfoundland in Canada to Cape Cod in USA. Probably has a much wider distribution. Possibly occurring off the Cape in South Africa and off Mozambique.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interestResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026