HomeFreshwater aquarium fishGuppies & livebearersDarkedged splitfin Darkedged splitfin (Girardinichthys multiradiatus) Scientific name: Girardinichthys multiradiatus Meek, 1904 The Darkedged splitfin (Girardinichthys multiradiatus) is a freshwater fish of the family Goodeidae. In the aquarium it needs water at 12–20°C (54–68°F). Native range: North America, upper Rio Lerma and Zempoala lagoon in Morelos, Mexico. Darkedged splitfin care at a glanceTemperature12–20°C (54–68°F) Species factsScientific nameGirardinichthys multiradiatusFamilyGoodeidae (Splitfins)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length3.5EnvironmentFreshwater;; pH range: 6.0 - 7.5; dH range: ? - 15 demersalClimateTemperateDistributionNorth America: upper Rio Lerma and Zempoala lagoon in Morelos, Mexico.Conservation status (IUCN)Vulnerable (VU) (A2ce, D2)Threat to humansHarmlessUsesAquarium: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (Fec=10-30) More guppies & livebearersBold characodonCharacodon audaxBluetail goodeaAtaeniobius toweriButterfly splitfinAmeca splendensPoecilia 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