HomeFish encyclopediaRay-finned fishesPerch-like fishMojarrasIrish mojarra Irish mojarra (Diapterus auratus) Scientific name: Diapterus auratus Ranzani, 1842 The Irish mojarra (Diapterus auratus) is a brackish-water fish of the family Gerreidae. Native range: Western Atlantic, North Carolina, USA and Greater Antilles to S?o Paulo, Brazil. BiologyInhabits shallow coastal waters, especially in mangrove-lined creeks and lagoons, but also found on vegetated sand grounds in typical marine areas. Young more widespread than adults. Feeds on bottom-dwelling invertebrates. Consumed fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDiapterus auratusFamilyGerreidae (Mojarras)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length34.0Common length20.0EnvironmentMarine; brackish; demersalClimateTropicalDistributionWestern Atlantic: North Carolina, USA and Greater Antilles to S?o Paulo, Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor 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