HomeFish encyclopediaRay-finned fishesPerch-like fishDrums or croakersDwarf weakfish Dwarf weakfish (Cynoscion nannus) Scientific name: Cynoscion nannus Castro-Aguirre & Arvizu-Martinez, 1976 The Dwarf weakfish (Cynoscion nannus) is a marine fish of the family Sciaenidae. Native range: Eastern Central Pacific, Mexico. Species factsScientific nameCynoscion nannusFamilySciaenidae (Drums or croakers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length27.0Common length20.0Depth range100–812 m (328–2664 ft)EnvironmentMarine; benthopelagic; depth range 100 - 812 mClimateDeep-waterDistributionEastern Central Pacific: Mexico.Conservation status (IUCN)Least Concern (LC)Threat 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