HomeFish encyclopediaRay-finned fishesPerch-like fishMojarrasRyukyu banded silver-biddy Ryukyu banded silver-biddy (Gerres ryukyuensis) Scientific name: Gerres ryukyuensis Iwatsuki, Kimura & Yoshino, 2007 The Ryukyu banded silver-biddy (Gerres ryukyuensis) is a brackish-water fish of the family Gerreidae. Native range: Northwest Pacific, currently known only from the Haneji Inland Sea, northwestern part of Okinawa I., Ryukyu Is., Japan. Species factsScientific nameGerres ryukyuensisFamilyGerreidae (Mojarras)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length13.9EnvironmentMarine; brackish; demersalClimateSubtropicalDistributionNorthwest Pacific: currently known only from the Haneji Inland Sea, northwestern part of Okinawa I., Ryukyu Is., JapanConservation status (IUCN)Not EvaluatedResilienceHigh, 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