HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesSplitfinsFreckled splitfin Freckled splitfin (Ilyodon cortesae) Scientific name: Ilyodon cortesae Paulo-Maya & Trujillo-Jim?nez, 2000 The Freckled splitfin (Ilyodon cortesae) is a freshwater fish of the family Goodeidae. In the aquarium it needs water at 20°C (68°F). Native range: North America, San Juan Tacambaro river, Michoacan, M?xico. Freckled splitfin care at a glanceTemperature20°C (68°F) BiologyDorsal soft rays (total): 15-18; Anal soft rays: 11 - 13. 52 to 60 scales in a longitudinal series; jaw with two irregular series of strongly implanted bifid teeth; the pores of the lateral line in the preorbital branch are wide and always in a straight line; the prezygapophyses of caudal peduncle vertebrae are short and do not touch the adjacent postzygapophyses.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIlyodon cortesaeFamilyGoodeidae (Splitfins)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.2Depth range0–1 m (0–3 ft)EnvironmentFreshwater;; pH range: 7.5 - 7.5 pelagic; depth range 0 - 1 mClimateTropicalDistributionNorth America: San Juan Tacambaro river, Michoacan, M?xico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026