HomeFish encyclopediaRay-finned fishesPerch-like fishJacks and pompanosJapanese scad Japanese scad (Decapterus maruadsi) Scientific name: Decapterus maruadsi Temminck & Schlegel, 1843 The Japanese scad (Decapterus maruadsi) is a marine fish of the family Carangidae. Native range: Indo-West Pacific, South China Sea to the Mariana Islands. Reported occurrence in southern Africa could not be confirmed. BiologyDorsal spines (total): 9; Dorsal soft rays (total): 30-36; Anal spines: 3; Anal soft rays: 25 - 30Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDecapterus maruadsiFamilyCarangidae (Jacks and pompanos)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length25.0EnvironmentMarine; reef-associated; depth range 0 - ? m, usually 0 - 20 mClimateTropicalDistributionIndo-West Pacific: South China Sea to the Mariana Islands. Reported occurrence in southern Africa could not be confirmed.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: highly commercialResilienceHigh, minimum population doubling time less than 15 months (K=0.5-1.3; tmax=9) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026