HomeFish encyclopediaRay-finned fishesCatfishNorth American freshwater catfishesMountain madtom Mountain madtom (Noturus eleutherus) Scientific name: Noturus eleutherus Jordan, 1877 The Mountain madtom (Noturus eleutherus) is a freshwater fish of the family Ictaluridae. BiologyInhabits clean rocky riffles, shoals and runs of small to large rivers. Often found near vegetation. Feeds on larvae of aquatic insects, dominated by mayflies.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNoturus eleutherusFamilyIctaluridae (North American freshwater catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Common length4.4EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Ohio River basin from northwestern Pennsylvania to eastern Illinois, and south to Tennessee and northern Georgia in the USA; White and St. Francis River drainages in Missouri and Arkansas, USA; Mississippi River in western Tennessee, USA; Ouachita River and Red River drainages in the USA.Conservation status (IUCN)Not EvaluatedThreat 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