HomeFish encyclopediaRay-finned fishesPerch-like fishMojarrasTidewater mojarra Tidewater mojarra (Eucinostomus harengulus) Scientific name: Eucinostomus harengulus Goode & Bean, 1879 The Tidewater mojarra (Eucinostomus harengulus) is a brackish-water fish of the family Gerreidae. Native range: Western Central Atlantic, Bermuda and Chesapeake Bay (USA) to Sao Paulo, Brazil, including the Bahamas, Barbados, and throughout the Gulf of Mexico. BiologyPrimarily in estuarine waters, in seagrass beds, open sand and mud bottoms, and in mangrove forests. Penetrates freshwater tributaries. Feeds mainly on benthic invertebrates.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEucinostomus harengulusFamilyGerreidae (Mojarras)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0EnvironmentMarine; brackish; demersalClimateTropicalDistributionWestern Central Atlantic: Bermuda and Chesapeake Bay (USA) to Sao Paulo, Brazil, including the Bahamas, Barbados, and throughout the Gulf of Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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