HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsGiant barb Giant barb (Catlocarpio siamensis) Scientific name: Catlocarpio siamensis Boulenger, 1898 The Giant barb (Catlocarpio siamensis) is a freshwater fish of the family Cyprinidae. Native range: Asia, Maeklong, Mekong and Chao Phraya basins. BiologyDorsal spines (total): 0. Head very large, about 2.5 times in SL; no barbels; no dorsal spine; 90-110 long gill rakers on first gill arch.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCatlocarpio siamensisFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length300EnvironmentFreshwater; benthopelagic; potamodromousClimateTropicalDistributionAsia: Maeklong, Mekong and Chao Phraya basins.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercial; aquaculture: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming tm=5-10) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026