HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesLongjaw goby Longjaw goby (Gobiopsis macrostoma) Scientific name: Gobiopsis macrostoma Steindachner, 1861 The Longjaw goby (Gobiopsis macrostoma) is a freshwater fish of the family Gobiidae. Native range: Indo-West Pacific, western India to the Mekong. BiologyFound in coastal waters, estuaries, tidal rivers, canals and creeks. Feeds on small fishes, crustaceans and insects. Not seen in markets.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGobiopsis macrostomaFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length10.0EnvironmentMarine; freshwater; brackish; demersal; amphidromousClimateTropicalDistributionIndo-West Pacific: western India to the Mekong.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, minimum population doubling time less than 15 months (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