HomeFish encyclopediaRay-finned fishesCatfishNorth American freshwater catfishesPygmy madtom Pygmy madtom (Noturus stanauli) Scientific name: Noturus stanauli Etnier & Jenkins, 1980 The Pygmy madtom (Noturus stanauli) is a freshwater fish of the family Ictaluridae. BiologyOccurs in moderate to swift gravel runs of clear medium-sized rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNoturus stanauliFamilyIctaluridae (North American freshwater catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length4.2EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Tennessee River drainage in Tennessee, USA; known only from Clinch River at Frost Ford and Brooks Island in Hancock County and Duck River just above mouth of Hurricane Creek in Humphreys County.Conservation status (IUCN)Vulnerable (VU) (D2)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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