HomeFish encyclopediaRay-finned fishesPerch-like fishMojarrasCommon silver-biddy Common silver-biddy (Gerres oyena) Scientific name: Gerres oyena Forssk?l, 1775 The Common silver-biddy (Gerres oyena) is a brackish-water fish of the family Gerreidae. BiologyFound along the coast, saltwater lagoons, and estuaries. Occurs singly or in groups. Feeds on small organisms living on sandy bottoms. Utilized as fish meal and duck food. Sold fresh in markets.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGerres oyenaFamilyGerreidae (Mojarras)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Common length20.0Depth range20 m (66 ft)EnvironmentMarine; brackish; reef-associated; depth range ? - 20 mClimateTropicalDistributionIndo-Pacific: Red Sea, Persian Gulf and East Africa, possibly including Seychelles, to the southeastern coasts of India and around Sri Lanka; elsewhere, extending to the western Pacific.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, 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