HomeFish encyclopediaRay-finned fishesPerch-like fishDrums or croakersSilver weakfish Silver weakfish (Isopisthus remifer) Scientific name: Isopisthus remifer Jordan & Gilbert, 1882 The Silver weakfish (Isopisthus remifer) is a brackish-water fish of the family Sciaenidae. Native range: Eastern Pacific, Gulf of California and southern Baja California, Mexico to Peru. BiologyInhabits coastal waters and lower estuarine regions. Feeds on fishes, shrimps and cephalopods.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIsopisthus remiferFamilySciaenidae (Drums or croakers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length36.0Common length25.0EnvironmentMarine; brackish; benthopelagicClimateTropicalDistributionEastern Pacific: Gulf of California and southern Baja California, Mexico to Peru.Conservation status (IUCN)Least Concern (LC)Threat 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