HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPoeciliidsSwamp guppies Swamp guppies (Micropoecilia picta) Scientific name: Micropoecilia picta Regan, 1913 The Swamp guppies (Micropoecilia picta) is a freshwater fish of the family Poeciliidae. In the aquarium it needs water at 26–28°C (79–82°F). Native range: Central and South America, Trinidad to the Amazon River delta. Swamp guppies care at a glanceTemperature26–28°C (79–82°F) BiologyInhabits mildly brackish water in canals and drainage ditches at the edges of swamps, but does venture far inland.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicropoecilia pictaFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length3.0EnvironmentFreshwater; brackish;; pH range: 7.5 - 8.2; dH range: 20 - 40 benthopelagic; non-migratoryClimateTropicalDistributionCentral and South America: Trinidad to the Amazon River delta.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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