HomeFish encyclopediaRay-finned fishesCarpsMountain carpsRainbow minnow Rainbow minnow (Psilorhynchus gracilis) Scientific name: Psilorhynchus gracilis Rainboth, 1983 The Rainbow minnow (Psilorhynchus gracilis) is a freshwater fish of the family Psilorhynchidae. Native range: Asia, Bangladesh. BiologyOccurs over small pebbles in shallow running waters where the bottom is mainly sand.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePsilorhynchus gracilisFamilyPsilorhynchidae (Mountain carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: Bangladesh.Conservation status (IUCN)Least Concern (LC)Threat 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