HomeFish encyclopediaRay-finned fishesCatfishNorth American freshwater catfishesOzark madtom Ozark madtom (Noturus albater) Scientific name: Noturus albater Taylor, 1969 The Ozark madtom (Noturus albater) is a freshwater fish of the family Ictaluridae. Native range: North America, Ozark Uplands of Missouri and Arkansas, USA in upper White (including Red River) and St. Francis River drainages. BiologyDorsal soft rays (total): 7; Anal soft rays: 15 - 17; Vertebrae: 39 - 43Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNoturus albaterFamilyIctaluridae (North American freshwater catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length12.0Common length7.0EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: Ozark Uplands of Missouri and Arkansas, USA in upper White (including Red River) and St. Francis River drainages.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (tmax=3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026