HomeFish encyclopediaRay-finned fishesCarpsSuckersYaqui sucker Yaqui sucker (Catostomus bernardini) Scientific name: Catostomus bernardini Girard, 1856 The Yaqui sucker (Catostomus bernardini) is a freshwater fish of the family Catostomidae. Native range: North America, Rio Yaqui basin in extreme southeast Arizona, USA and northwest Mexico. BiologyOccurs in small mountain and desert creeks, and deep pools, runs and rapids of medium rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCatostomus bernardiniFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length40.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Rio Yaqui basin in extreme southeast Arizona, USA and northwest Mexico.Conservation status (IUCN)Vulnerable (VU) (A1ae+2e)Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 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