HomeFreshwater aquarium fishRainbowfish & killifishCuban killifish Cuban killifish (Cubanichthys cubensis) Scientific name: Cubanichthys cubensis Eigenmann, 1903 The Cuban killifish (Cubanichthys cubensis) is a freshwater fish of the family Cyprinodontidae. In the aquarium it needs water at 23–28°C (73–82°F). Native range: Central America, Cuba. Cuban killifish care at a glanceTemperature23–28°C (73–82°F) BiologyNot a seasonal killifish. Is easy to maintain in the aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCubanichthys cubensisFamilyCyprinodontidae (Pupfishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length8.0EnvironmentFreshwater; brackish;; pH range: 7.0 - ? demersal; non-migratoryClimateTropicalDistributionCentral America: Cuba.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More rainbowfish & killifishJavanese ricefishOryzias javanicusBlackfin pearlfishAustrolebias nigripinnisForktail rainbowfishPseudomugil furcatusDwarf rainbowfishMelanotaenia praecoxLake Kutubu rainbowfishMelanotaenia lacustrisTami River rainbowfishGlossolepis pseudoincisusSee 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