HomeFish encyclopediaRay-finned fishesSilversidesPriapiumfishesSmith's priapium fish Smith's priapium fish (Phenacostethus smithi) Scientific name: Phenacostethus smithi Myers, 1928 The Smith's priapium fish (Phenacostethus smithi) is a freshwater fish of the family Phallostethidae. Native range: Asia, Chao Phraya basin and coastal streams of south-east Thailand and Cambodia and Mekong basin. Reported from Sumatra, Indonesia and Malaysia. Species factsScientific namePhenacostethus smithiFamilyPhallostethidae (Priapiumfishes)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length2.0EnvironmentFreshwater; brackish; benthopelagicClimateTropicalDistributionAsia: Chao Phraya basin and coastal streams of south-east Thailand and Cambodia and Mekong basin. Reported from Sumatra, Indonesia and Malaysia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026