HomeFreshwater aquarium fishGuppies & livebearersPorthole livebearer Porthole livebearer (Poeciliopsis gracilis) Scientific name: Poeciliopsis gracilis Heckel, 1848 The Porthole livebearer (Poeciliopsis gracilis) 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, southern Mexico to Honduras. Porthole livebearer care at a glanceTemperature24–28°C (75–82°F) Species factsScientific namePoeciliopsis gracilisFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.1EnvironmentFreshwater;; pH range: 6.5 - 7.8; dH range: ? - 25 benthopelagic; non-migratoryClimateTropicalDistributionCentral America: southern Mexico to Honduras.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (tm More guppies & livebearersGuppyPoecilia reticulataSailfin mollyPoecilia latipinnaGreen swordtailXiphophorus helleriiSouthern platyfishXiphophorus maculatusMosquitofishGambusia affinisMollyPoecilia sphenopsSee all guppies & livebearers SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026