HomeFish encyclopediaRay-finned fishesSmeltsTubeshouldersTusked tubeshoulder Tusked tubeshoulder (Holtbyrnia laticauda) Scientific name: Holtbyrnia laticauda Sazonov, 1976 The Tusked tubeshoulder (Holtbyrnia laticauda) is a marine fish of the family Platytroctidae. Native range: Eastern Atlantic, South Africa: Indo-West Pacific: South Africa to New Zealand. BiologyDorsal spines: 0; Dorsal soft rays: 19-21; Anal spines: 0; Anal soft rays: 15 - 17Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHoltbyrnia laticaudaFamilyPlatytroctidae (Tubeshoulders)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Depth range1140–1630 m (3740–5348 ft)EnvironmentMarine; bathypelagic; depth range 1140 - 1630 mClimateDeep-waterDistributionEastern Atlantic: South Africa: Indo-West Pacific: South Africa to New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026