HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesDiamond leatherjacket Diamond leatherjacket (Rudarius excelsus) Scientific name: Rudarius excelsus Hutchins, 1977 The Diamond leatherjacket (Rudarius excelsus) is a marine fish of the family Monacanthidae. Native range: Western Pacific, northern Australia to southern Japan. BiologyInhabits sheltered coastal habitats, usually in areas with mixed low reef and sparse seagrass.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRudarius excelsusFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length2.5EnvironmentMarine; reef-associatedClimateTropicalDistributionWestern Pacific: northern Australia to southern Japan.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