HomeFreshwater aquarium fishRainbowfish & killifishScaleless killifish Scaleless killifish (Aphanius asquamatus) Scientific name: Aphanius asquamatus S?zer, 1942 The Scaleless killifish (Aphanius asquamatus) is a freshwater fish of the family Cyprinodontidae. In the aquarium it needs water at 10–25°C (50–77°F). Native range: Asia, Lake Hazar, eastern Anatolia, Turkey and Iran. Scaleless killifish care at a glanceTemperature10–25°C (50–77°F) BiologyNot a seasonal killifish. Is very difficult to maintain in the aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAphanius asquamatusFamilyCyprinodontidae (Pupfishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.0EnvironmentFreshwater; benthopelagic; non-migratoryClimateTemperateDistributionAsia: Lake Hazar, eastern Anatolia, Turkey and Iran.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More rainbowfish & killifishRed rainbowfishGlossolepis incisusTami River rainbowfishGlossolepis pseudoincisusLake Kutubu rainbowfishMelanotaenia lacustrisDwarf rainbowfishMelanotaenia praecoxForktail rainbowfishPseudomugil furcatusBlackfin pearlfishAustrolebias nigripinnisSee all rainbowfish & killifish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026