HomeFish encyclopediaRay-finned fishesPerch-like fishJacks and pompanosYellowfin jack Yellowfin jack (Hemicaranx leucurus) Scientific name: Hemicaranx leucurus G?nther, 1864 The Yellowfin jack (Hemicaranx leucurus) is a brackish-water fish of the family Carangidae. Native range: Eastern Pacific, southern tip of Baja California, Mexico and southern Gulf of California to Ecuador. BiologyBody sub-oval and compressed; both jaws with a single row of small, comb-like teeth; pectoral fins falcate and relatively long (from 2.5 to 3.0 times in total length); back silvery blue; belly and flanks white or silvery; pectoral fins yellowish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHemicaranx leucurusFamilyCarangidae (Jacks and pompanos)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Common length25.0EnvironmentMarine; brackish; benthopelagicClimateTropicalDistributionEastern Pacific: southern tip of Baja California, Mexico and southern Gulf of California to Ecuador.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; gamefish: yesResilienceHigh, 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