HomeFish encyclopediaRay-finned fishesCarpsSuckersMexican redhorse Mexican redhorse (Moxostoma austrinum) Scientific name: Moxostoma austrinum Bean, 1880 The Mexican redhorse (Moxostoma austrinum) is a freshwater fish of the family Catostomidae. Native range: North America, Alamito Creek, Big Bend in Texas, USA and from Lerma River basin, Mexico. BiologyInhabits rocky runs and riffles of creeks and small to medium rivers. Often found near boulders in swift water.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMoxostoma austrinumFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length49.0EnvironmentFreshwater; demersalClimateSubtropicalDistributionNorth America: Alamito Creek, Big Bend in Texas, USA and from Lerma River basin, Mexico.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