HomeFreshwater aquarium fishRainbowfish & killifishBayou topminnow Bayou topminnow (Fundulus nottii) Scientific name: Fundulus nottii Agassiz, 1854 The Bayou topminnow (Fundulus nottii) is a freshwater fish of the family Fundulidae. Native range: North America, occurs only in the USA from southeast Louisiana to southwest Alabama. BiologyOccur in swamps, sloughs, and vegetated backwaters and pools of streams. 7.8 cm max TL. Not a seasonal killifish. Is easy to maintain in the aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameFundulus nottiiFamilyFundulidae (Topminnows and killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length6.0EnvironmentFreshwater; benthopelagic; non-migratoryClimateSubtropicalDistributionNorth America: occurs only in the USA from southeast Louisiana to southwest Alabama.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) 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