HomeFish encyclopediaRay-finned fishesCarpsSuckersHarelip sucker Harelip sucker (Moxostoma lacerum) Scientific name: Moxostoma lacerum Jordan & Brayton, 1877 The Harelip sucker (Moxostoma lacerum) is a freshwater fish of the family Catostomidae. Native range: North America, USA. Species factsScientific nameMoxostoma lacerumFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length31.3EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: USA.Conservation status (IUCN)Extinct (EX)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