HomeFish encyclopediaSharks and RaysGround sharksFalse catsharksSlender smooth-hound Slender smooth-hound (Gollum attenuatus) Scientific name: Gollum attenuatus Garrick, 1954 The Slender smooth-hound (Gollum attenuatus) is a marine fish of the family Pseudotriakidae. BiologyAn uncommon to common deep-water bottom-dwelling shark found on the outermost continental shelf and upper slope of New Zealand and on adjacent seamounts and submarine banks. Seems adapted to waters of about 10?C and 34.8 ppt salinity. Feeds on a wide variety of fishes, cephalopods, and other invertebrates. Probably in schools. Females grow slightly larger than males. Ovoviviparous, embryos feeding on yolk sac and other ova produced by the mother, uterine milk is consumed additionally. Two young are born per litter.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGollum attenuatusFamilyPseudotriakidae (False catsharks)OrderCarcharhiniformes (Ground sharks)ClassElasmobranchii (Sharks and Rays)Maximum length107Depth range120–660 m (394–2165 ft)EnvironmentMarine; bathydemersal; depth range 120 - 660 m, usually 400 - 600 mClimateDeep-waterDistributionSouthwest Pacific: occurs off New Zealand and on rises between New Zealand and the east coast of Australia, New Caledonia, and Fiji just south of the Western Central Pacific. Placement in Proscyllidae provisional, probably will be relocated in Pseudotriakidae.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interestResilienceVery Low, minimum population doubling time more than 14 years (Fec=2) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026