HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsPlains minnow Plains minnow (Hybognathus placitus) Scientific name: Hybognathus placitus Girard, 1856 The Plains minnow (Hybognathus placitus) is a freshwater fish of the family Cyprinidae. BiologyAbundant in shallow sandy runs and pools of creeks and small to large rivers. Oviparous, probably open substratum spawners like congeners.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHybognathus placitusFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Common length7.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Missouri, Arkansas, Red, Brazos, and Colorado River drainages from Montana and North Dakota south to New Mexico and Texas, USA; Mississippi River from mouth of Missouri River to mouth of Ohio River.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026