Common silver-biddy

{{Short description|Species of fish}}

{{Speciesbox

| image = Gerres oyena Ford 25.jpg

| image_caption =

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn | author1 = Munroe, T.A. | author2 = Greenfield, D. | author3 = Williams, I. | name-list-style = amp | year = 2016 | title = Gerres oyena |errata=2017 | page = e.T166919A115305348 | doi = 10.2305/IUCN.UK.2016-1.RLTS.T166919A1152301.en | access-date = 24 February 2020}}

| taxon = Gerres oyena

| authority = (Forsskål, 1775)

| synonyms =

• Labrus oeyena Forsskål, 1775
• Diapterus oyena (Forsskål, 1775)
• Labrus oyena (Forsskål, 1775)
• Smaris oyena (Forsskål, 1775)
• Xystaema oyena (Forsskål, 1775)
• Cichla argyrea J. R. Forster, 1801
• Gerres argyreus (J. R. Forster, 1801)
• Gerres vaigiensis Quoy & Gaimard, 1824
• Gerres kapas Bleeker, 1851
• Diapterus kapas (Bleeker, 1851)
• Xystaema kapas (Bleeker, 1851)
• Gerres australis Castelnau, 1875
• Gerreomorpha rostrata Alleyne & Macleay, 1877
• Gerres carinatus Alleyne & Macleay, 1877
• Gerres splendens De Vis, 1884
• Gerres socotranus Steindachner, 1902

| synonyms_ref = {{FishBase|Gerres|oyena|month=December|year=2019}}

}}

The common silver-biddy (Gerres oyena), also known as the blacktip silver biddy, Darnley Island silverbelly, longtail silverbiddy, oceanic silver biddy, shining silver-belly or slender silver belly,{{cite web | author = Dianne J. Bray | title = Gerres oyena | work = Fishes of Australia | accessdate = 24 February 2020 | url = http://136.154.202.208/home/species/447 | publisher = Museums Victoria}} is a species of mojarra native to marine and brackish waters of coastal waters of the Indian Ocean and the western Pacific Ocean. It inhabits estuaries, coastal waters and lagoons. This species can reach a length of {{convert|30|cm|in|abbr=on}}, though most do not exceed {{convert|20|cm|in|abbr=on}}. This species is important to local commercial fisheries.