HomeFreshwater aquarium fishGuppies & livebearersSouthern platyfish Southern platyfish (Xiphophorus maculatus) Scientific name: Xiphophorus maculatus G?nther, 1866 The Southern platyfish (Xiphophorus maculatus) is a freshwater fish of the family Poeciliidae that grows to about 4 cm (1.6 in). In the aquarium it needs water at 18–25°C (64–77°F). Native range: North and Central America, Ciudad Veracruz, Mexico to northern Belize. Southern platyfish care at a glanceAdult size4 cm (1.6 in)Temperature18–25°C (64–77°F) BiologyAdults occur in warm springs, canals and ditches with typically slow-moving water, silt bottoms and weedy banks (Refs. 5723; 44091, 44894). Also inhabit creeks and swamps. Feed on worms, crustaceans, insects and plant matter (Refs. 7020; 44091). Used for genetic research. Several color varieties are popular aquarium fishes, where they attain sexual maturity after 3-4 months and reproduce easily. Aquarium keeping: minimum aquarium size 60 cm.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameXiphophorus maculatusFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.0Common length2.4EnvironmentFreshwater;; pH range: 7.0 - 8.0; dH range: 9 - 19 benthopelagic; non-migratoryClimateTropicalDistributionNorth and Central America: Ciudad Veracruz, Mexico to northern Belize. At least one country reports adverse ecological impact after introduction.Conservation status (IUCN)Not EvaluatedUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (tm More guppies & livebearersGreen swordtailXiphophorus helleriiGuppyPoecilia reticulataSailfin mollyPoecilia latipinnaMosquitofishGambusia affinisMollyPoecilia sphenopsBlackbarred limiaLimia nigrofasciataSee all guppies & livebearers SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026