HomeFish encyclopediaRay-finned fishesCatfishLong-whiskered catfishesArrowhead shovelnose Arrowhead shovelnose (Sorubim trigonocephalus) Scientific name: Sorubim trigonocephalus Miranda Ribeiro, 1920 The Arrowhead shovelnose (Sorubim trigonocephalus) is a freshwater fish of the family Pimelodidae. Native range: South America, Madeira and Tapaj?s River basins, two Amazon tributaries. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 6; Anal soft rays: 19 - 22; Vertebrae: 58. Distinguished from its congeners by the following combination of characters: snout very elongated, triangular or arrowhead shaped in dorsal and ventral view; exposed portion of premaxillary tooth patch as long as wide.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSorubim trigonocephalusFamilyPimelodidae (Long-whiskered catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length50.7EnvironmentFreshwater; demersalClimateTropicalDistributionSouth America: Madeira and Tapaj?s River basins, two Amazon tributaries.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 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