HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPoeciliidsSoconusco gambusia Soconusco gambusia (Brachyrhaphis hartwegi) Scientific name: Brachyrhaphis hartwegi Rosen & Bailey, 1963 The Soconusco gambusia (Brachyrhaphis hartwegi) is a freshwater fish of the family Poeciliidae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Central America, Mexico to Guatemala. Soconusco gambusia care at a glanceTemperature24–28°C (75–82°F) Species factsScientific nameBrachyrhaphis hartwegiFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length3.5EnvironmentFreshwater;; pH range: 7.0 - 7.5; dH range: ? - 5 pelagic; non-migratoryClimateTropicalDistributionCentral America: Mexico to Guatemala.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (tm SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026