HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesBlack reef leatherjacket Black reef leatherjacket (Eubalichthys bucephalus) Scientific name: Eubalichthys bucephalus Whitley, 1931 The Black reef leatherjacket (Eubalichthys bucephalus) is a brackish-water fish of the family Monacanthidae. Native range: Eastern Indian Ocean, southern Australia, from southern Western Australia to New South Wales. BiologyOccurs on the continental shelf. Observed in pairs, secretly moving about in and out of holes among boulders.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEubalichthys bucephalusFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Depth range10–250 m (33–820 ft)EnvironmentMarine; brackish; demersal; depth range 10 - 250 mClimateSubtropicalDistributionEastern Indian Ocean: southern Australia, from southern Western Australia to New South Wales.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 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