HomeFish encyclopediaRay-finned fishesPerch-like fishJacks and pompanosLongjaw leatherjacket Longjaw leatherjacket (Oligoplites altus) Scientific name: Oligoplites altus G?nther, 1868 The Longjaw leatherjacket (Oligoplites altus) is a brackish-water fish of the family Carangidae. Native range: Eastern Pacific, Mexico to Peru. BiologyBody elongate, fairly deep, and compressed (depth from 2.5 to 3.4 times in standard length); posterior edge of upper jaw extending beyond posterior rim of eye; upper jaw teeth small and villiform; lower branch of first gill arch with 8 to 13 gill rakers; scales small but visible, needle-shaped, embedded in the skin; body gray or brown; flanks and belly silvery with yellow highlights.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOligoplites altusFamilyCarangidae (Jacks and pompanos)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length56.0Common length30.0EnvironmentMarine; brackish; benthopelagicClimateTropicalDistributionEastern Pacific: Mexico to Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansVenomousUsesFisheries: commercialResilienceMedium, 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