HomeFish encyclopediaRay-finned fishesPerch-like fishSleepersFour-eyed sleeper Four-eyed sleeper (Bostrychus sinensis) Scientific name: Bostrychus sinensis Lacep?de, 1801 The Four-eyed sleeper (Bostrychus sinensis) is a freshwater fish of the family Eleotridae. Native range: Indo-Pacific, India to Australia and Taiwan. Also found in Japan and China. BiologyAnal spines: 1; Anal soft rays: 8 - 10; Vertebrae: 26 - 27Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBostrychus sinensisFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length22.0EnvironmentMarine; freshwater; brackish; demersal; amphidromousClimateTropicalDistributionIndo-Pacific: India to Australia and Taiwan. Also found in Japan and China.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceMedium, 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