HomeFish encyclopediaRay-finned fishesCarpsSuckersBlacktail redhorse Blacktail redhorse (Moxostoma poecilurum) Scientific name: Moxostoma poecilurum Jordan, 1877 The Blacktail redhorse (Moxostoma poecilurum) is a freshwater fish of the family Catostomidae. BiologyInhabits sandy and rocky pools, runs and riffles of small to medium rivers. Also found in impoundments. Feeds on detritus, diatoms, and a wide variety of small invertebrates such as microcrustacea, rotifers, caddisfly larvae, and phantom midge larvae.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMoxostoma poecilurumFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length51.0Common length25.5EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Mississippi River tributaries on Former Mississippi Embayment from southern Kentucky and southern Arkansas south to Louisiana in the USA; Gulf Slope drainages from Choctawhatchee River in Alabama and Florida to Galveston Bay in Texas in the USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (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