HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPoeciliidsCayman gambusia Cayman gambusia (Gambusia xanthosoma) Scientific name: Gambusia xanthosoma Greenfield, 1983 The Cayman gambusia (Gambusia xanthosoma) is a freshwater fish of the family Poeciliidae. Native range: Central America, Grand Cayman Island. Species factsScientific nameGambusia xanthosomaFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length3.4EnvironmentFreshwater; brackish; benthopelagic; non-migratoryClimateTropicalDistributionCentral America: Grand Cayman Island.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