HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesBlue-spotted leatherjacket Blue-spotted leatherjacket (Eubalichthys caeruleoguttatus) Scientific name: Eubalichthys caeruleoguttatus Hutchins, 1977 The Blue-spotted leatherjacket (Eubalichthys caeruleoguttatus) is a marine fish of the family Monacanthidae. Native range: Eastern Indian Ocean, northwestern Australia. BiologyDorsal soft rays (total): 35-38; Anal soft rays: 34 - 36; Vertebrae: 19. Diagnosis: Low fin ray counts (D.32; A.33); the base of anal fin longer than soft dorsal base; caudal fin greatly elongate (0.7 in head length). Two pairs of spines on each side of caudal peduncle. Pelvic bony structure very small, located about 1 eye diameter anterior to rear end of pelvis.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEubalichthys caeruleoguttatusFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Depth range22–82 m (72–269 ft)EnvironmentMarine; demersal; depth range 22 - 82 mClimateTropicalDistributionEastern Indian Ocean: northwestern Australia.Conservation status (IUCN)Data deficient (DD)Threat 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