HomeFish encyclopediaRay-finned fishesCarpsSuckersUsumacinta buffalo Usumacinta buffalo (Ictiobus meridionalis) Scientific name: Ictiobus meridionalis G?nther, 1868 The Usumacinta buffalo (Ictiobus meridionalis) is a freshwater fish of the family Catostomidae. Native range: Central America, southern Mexico and Guatemala. BiologyDorsal spines (total): 3; Dorsal soft rays (total): 23; Anal spines: 2; Anal soft rays: 9. Caudal fin count, 25 soft rays. Ovary weight, 0.055 kg (E.Perusquia as pers. comm., 02/05).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIctiobus meridionalisFamilyCatostomidae (Suckers)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; demersalClimateTropicalDistributionCentral America: southern Mexico and Guatemala.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceVery Low, minimum population doubling time more than 14 years (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