HomeFish encyclopediaRay-finned fishesPerch-like fishJacks and pompanosThreadfin jack Threadfin jack (Carangoides otrynter) Scientific name: Carangoides otrynter Jordan & Gilbert, 1883 The Threadfin jack (Carangoides otrynter) is a marine fish of the family Carangidae. Native range: Eastern Pacific, southern Baja California, Mexico to Ecuador and the Galapagos Islands. BiologyBody compressed and sub-oval in juveniles, oblong in adults; dorsal profile of snout slightly oblique, then abruptly vertical over anterior edge of premaxilla; lobes of second dorsal and anal fins very long; ventral part of chest scaleless up to origin of pectoral fins; body silvery blue with yellow golden highlights; dorsal side of operculum with a black spot; base of second dorsal fin membranes with small black spots.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCarangoides otrynterFamilyCarangidae (Jacks and pompanos)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length60.0Common length30.0Depth range60–100 m (197–328 ft)EnvironmentMarine; benthopelagic; oceanodromous; depth range 60 - 100 mClimateTropicalDistributionEastern Pacific: southern Baja California, Mexico to Ecuador and the Galapagos Islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercial; gamefish: yesResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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