HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesBluetail leatherjacket Bluetail leatherjacket (Eubalichthys cyanoura) Scientific name: Eubalichthys cyanoura Hutchins, 1987 The Bluetail leatherjacket (Eubalichthys cyanoura) is a marine fish of the family Monacanthidae. Native range: Eastern Indian Ocean, southern Australia. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 31-35; Anal spines: 0; Anal soft rays: 32 - 35. Caudal fin rounded; pelvic fins rudimentary.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEubalichthys cyanouraFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length42.0EnvironmentMarine; reef-associatedClimateSubtropicalDistributionEastern Indian Ocean: southern Australia.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