HomeFish encyclopediaRay-finned fishesCatfishNorth American freshwater catfishesBrown madtom Brown madtom (Noturus phaeus) Scientific name: Noturus phaeus Taylor, 1969 The Brown madtom (Noturus phaeus) is a freshwater fish of the family Ictaluridae. BiologyInhabits sand-gravel riffles and runs among debris, rocks and undercut banks of springs, creeks and small rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNoturus phaeusFamilyIctaluridae (North American freshwater catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Common length6.9EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Mississippi River tributaries in Kentucky, Tennessee, Alabama and Mississippi, USA; and in southern Arkansas, Louisiana and southwestern Mississippi, USA; Tennessee River tributaries in western Tennessee and northwestern Alabama, USA; Sabine River and Bayou Teche drainages in Alabama.Conservation status (IUCN)Not EvaluatedThreat 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