HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesFourband leatherjacket Fourband leatherjacket (Pseudomonacanthus elongatus) Scientific name: Pseudomonacanthus elongatus Fraser-Brunner, 1940 The Fourband leatherjacket (Pseudomonacanthus elongatus) is a marine fish of the family Monacanthidae. Native range: Indo-West Pacific. BiologyAdults usually found on muddy substrates with outcrops of algal reef, or among broad-leaved seagrasses. Young with floating Sargassum rafts and in shallow estuaries.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudomonacanthus elongatusFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Depth range1–7 m (3–23 ft)EnvironmentMarine; demersal; depth range 1 - 7 mClimateTropicalDistributionIndo-West Pacific.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, 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