HomeFish encyclopediaRay-finned fishesCarpsSuckersRustyside sucker Rustyside sucker (Thoburnia hamiltoni) Scientific name: Thoburnia hamiltoni Raney & Lachner, 1946 The Rustyside sucker (Thoburnia hamiltoni) is a freshwater fish of the family Catostomidae. Native range: North America, Upper Dan River system (in Roanoke River drainage) in Virginia, USA. BiologyInhabits rocky riffles and runs of swift mountain creeks and small rivers. Young occur in flowing pools.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThoburnia hamiltoniFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length11.1EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Upper Dan River system (in Roanoke River drainage) in Virginia, USA.Conservation status (IUCN)Lower Risk: near threatened (LR/nt)Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tmax=5) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026