HomeFish encyclopediaRay-finned fishesCarpsSuckersGray redhorse Gray redhorse (Moxostoma congestum) Scientific name: Moxostoma congestum Baird & Girard, 1854 The Gray redhorse (Moxostoma congestum) is a freshwater fish of the family Catostomidae. Native range: North America, USA; occurrence in Mexico is uncertain. BiologyInhabits lakes and deep runs and pools of small to medium rivers. Feeds on aquatic insects, mollusks, amphipods, ostracods, algae, plant seeds and fish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMoxostoma congestumFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length65.0EnvironmentFreshwater; demersalClimateSubtropicalDistributionNorth America: USA; occurrence in Mexico is uncertain.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessResilienceVery Low, minimum population doubling time more than 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