HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPoeciliidsMountain molly Mountain molly (Poecilia teresae) Scientific name: Poecilia teresae Greenfield, 1990 The Mountain molly (Poecilia teresae) is a freshwater fish of the family Poeciliidae. Native range: Central America, Belize. Species factsScientific namePoecilia teresaeFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionCentral America: Belize.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