HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesSplitfinsFinescale splitfin Finescale splitfin (Allodontichthys polylepis) Scientific name: Allodontichthys polylepis Rauchenberger, 1988 The Finescale splitfin (Allodontichthys polylepis) is a freshwater fish of the family Goodeidae. In the aquarium it needs water at 21–25°C (70–77°F). Native range: Central America, Rio Ameca basin, Jalisco, Mexico. Finescale splitfin care at a glanceTemperature21–25°C (70–77°F) BiologyInhabits a quiet pool of clear to murky water at a depth of up to 1.2 m and with bottom consisting of sand, silt, rocks and boulders.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAllodontichthys polylepisFamilyGoodeidae (Splitfins)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.5Depth range1 m (3 ft)EnvironmentFreshwater;; pH range: 7.0 - 7.7; dH range: 5 - 20 demersal; depth range ? - 1 mClimateTropicalDistributionCentral America: Rio Ameca basin, Jalisco, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026