HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesDusky leatherjacket Dusky leatherjacket (Paramonacanthus otisensis) Scientific name: Paramonacanthus otisensis Whitley, 1931 The Dusky leatherjacket (Paramonacanthus otisensis) is a marine fish of the family Monacanthidae. Native range: Southwest Pacific, Eastern Australia. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 24-30; Anal spines: 0; Anal soft rays: 24 - 30; Vertebrae: 19. Body width 2.0-2.5 in head length; body depth 1.9-3.1 in SL; head length 2.8-3.3 in SL; snout length 3.6-4.9 in SL; eye diameter 2.7-4.5 in head length. Adult caudal fin with moderately long filaments on upper and middle rays. Pelvic fin rudiment movable, small; pelvic flap moderately extendable. Pale grey or yellow to brown with variable dark markings.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParamonacanthus otisensisFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length11.0Depth range5–36 m (16–118 ft)EnvironmentMarine; demersal; depth range 5 - 36 mClimateSubtropicalDistributionSouthwest Pacific: Eastern Australia.Conservation status (IUCN)Not EvaluatedThreat 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