HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsThicklip barb Thicklip barb (Probarbus labeamajor) Scientific name: Probarbus labeamajor Roberts, 1992 The Thicklip barb (Probarbus labeamajor) is a freshwater fish of the family Cyprinidae. Native range: Asia, endemic to the Mekong. BiologyDorsal soft rays (total): 13; Anal soft rays: 8; Vertebrae: 40 - 41. Differs from the two other species of Probarbus in having slightly smaller (and more numerous) scales, scale row between dorsal fin origin and lateral line scale row 6; six instead of only five stripes on body above lateral line; lips greatly enlarged; barbels reduced in length, sometimes absent; and slightly more numerous vertebrae. Posterior margin of lower lip entirely free from side to side.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameProbarbus labeamajorFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length150EnvironmentFreshwater; benthopelagic; potamodromousClimateTropicalDistributionAsia: endemic to the Mekong.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: minor commercialResilienceVery 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