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Gerres oyena  (Forsskål, 1775)

Common silver-biddy
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Gerres oyena
Picture by Ryanskiy, A.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Gerreidae (Mojarras)
Etymology: Gerres: Latin, gerres = a kind of anchovies; cited by Plinius.

Environment / Climate / Range Ecology

Marine; brackish; reef-associated; depth range 0 - 20 m (Ref. 11441).   Tropical, preferred 27°C (Ref. 107945); 36°N - 35°S, 25°E - 174°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Indo-Pacific: Red Sea to South Africa, east to Marshall and Samoa islands; north to the Ryukyus and south to the Queensland, Australia (Great Barrier Reef) and New Caledonia.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 22 - ? cm
Max length : 30.0 cm TL male/unsexed; (Ref. 4323); common length : 20.0 cm SL male/unsexed; (Ref. 37816)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 7. Body silvery with 6-8 irregular, faint dusky oblique and vertical bands dorsolaterally and ventrolaterally (usually more apparent in young stressed or preserved specimens. U-shaped premaxilla groove mostly without scales (tiny scales anteriorly in specimens over 13 cm SL). Posterior margin of maxillary beyond a vertical through anterior margin of pupil. Supraneural bones 3. Spinous dorsal fin with an indistinct dusky patch (2nd-6th spines) and very narrow dusky distal margins on upper membranes between spines. Scales between 5th dorsal fin spine and lateral line 3-4, usually 3.5. Pelvic fin when fresh is semi-transparent or dull yellow color with an indistinct dusky band and dull white distal margin posteriorly (Ref. 35850); pectoral fins reaches beyond level of anus; caudal fin forked deeply and with long lobes (Ref. 90102).

Biology     Glossary (e.g. epibenthic)

Found along the coast, saltwater lagoons, and estuaries (Ref. 5213). Also in sand bottoms in sheltered waters near reefs (Ref. 90102). Occurs singly or in groups (Ref. 9710). Feeds on small organisms living on sandy bottoms. Utilized as fish meal and duck food. Sold fresh in markets.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Woodland, David J. | Collaborators

Iwatsuki, Y., S. Kimura and T. Yoshino, 1999. Redescriptions of Gerres baconensis (Evermann & Seale, 1907), G. equulus Temminck & Schlegel, 1844 and G. oyena (Forsskål, 1775), included in the "G. oyena complex", with notes on other related species (Perciformes: Gerreidae). Ichthyol. Res. 46(4):377-395. (Ref. 35850)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(fisheries: production; publication : search) | FisheriesWiki | Sea Around Us

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