HomeFreshwater aquarium fishGuppies & livebearersMarbled swordtail Marbled swordtail (Xiphophorus meyeri) Scientific name: Xiphophorus meyeri Schartl & Schr?der, 1988 The Marbled swordtail (Xiphophorus meyeri) is a freshwater fish of the family Poeciliidae. In the aquarium it needs water at 23–28°C (73–82°F). Native range: North America, R?o Salado ecoregion in Mexico. Marbled swordtail care at a glanceTemperature23–28°C (73–82°F) Species factsScientific nameXiphophorus meyeriFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length3.0EnvironmentFreshwater;; pH range: 7.0 - 7.7; dH range: 5 - 20 benthopelagic; non-migratoryClimateTropicalDistributionNorth America: R?o Salado ecoregion in Mexico.Conservation status (IUCN)Endangered (EN) (A1ace+2ce, B1+2c, C2b)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More guppies & livebearersButterfly splitfinAmeca splendensBluetail goodeaAtaeniobius toweriBold characodonCharacodon audaxPoecilia wingeiMollyPoecilia sphenopsSouthern platyfishXiphophorus maculatusSee 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