HomeFish encyclopediaRay-finned fishesCarpsSuckersTorrent sucker Torrent sucker (Thoburnia rhothoeca) Scientific name: Thoburnia rhothoeca Thoburn, 1896 The Torrent sucker (Thoburnia rhothoeca) is a freshwater fish of the family Catostomidae. BiologyInhabits rocky riffles and runs of moderate to swift creeks and small rivers. Young occur in rocky runs and pools.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThoburnia rhothoecaFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length12.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Atlantic Slope from upper Potomac River drainage in Virginia and West Virginia to Roanoke River drainage in northern central Virginia and adjacent West Virginia (absent in York River system), USA; upper New River drainage in Virginia (apparently extirpated), USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tmax=7) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026