HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesTopminnows and killifishesGiant killifish Giant killifish (Fundulus grandissimus) Scientific name: Fundulus grandissimus Hubbs, 1936 The Giant killifish (Fundulus grandissimus) is a freshwater fish of the family Fundulidae. Native range: Central America, Yucatan, Mexico. Species factsScientific nameFundulus grandissimusFamilyFundulidae (Topminnows and killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length20.0EnvironmentFreshwater; benthopelagic; non-migratoryClimateTropicalDistributionCentral America: Yucatan, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026