HomeFreshwater aquarium fishRainbowfish & killifishSeminole killifish Seminole killifish (Fundulus seminolis) Scientific name: Fundulus seminolis Girard, 1859 The Seminole killifish (Fundulus seminolis) is a freshwater fish of the family Fundulidae. In the aquarium it needs water at 5–24°C (41–75°F). Native range: North America, Peninsular Florida, USA from St. Johns (Atlantic) and New (Gulf) River drainages south to just below Lake Okeechobee. Seminole killifish care at a glanceTemperature5–24°C (41–75°F) BiologyInhabits open areas of lakes and quiet stream pools. Young are usually found in schools near vegetation. 16 cm max TL. Not a seasonal killifish. Is very difficult to maintain in aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameFundulus seminolisFamilyFundulidae (Topminnows and killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length7.5Common length12.5EnvironmentFreshwater; benthopelagic; non-migratoryClimateTemperateDistributionNorth America: Peninsular Florida, USA from St. Johns (Atlantic) and New (Gulf) River drainages south to just below Lake Okeechobee.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (tmax=2) More rainbowfish & killifishFlagfishJordanella floridaeBluefin killifishLucania goodeiKamaka rainbowfishMelanotaenia kamakaYellowbelly gudgeonAllomogurnda nesolepisStriped panchaxAplocheilus lineatusRedtail nothoNothobranchius guentheriSee 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