HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesSplitfinsAlien splitfin Alien splitfin (Chapalichthys peraticus) Scientific name: Chapalichthys peraticus ?lvarez, 1963 The Alien splitfin (Chapalichthys peraticus) is a freshwater fish of the family Goodeidae. Native range: Central America, Mexico. Species factsScientific nameChapalichthys peraticusFamilyGoodeidae (Splitfins)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentFreshwater; demersalClimateTropicalDistributionCentral America: Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026