Slender smooth-hound thus the International Union for Conservation of Nature (IUCN) has listed it under Least Concern. However, this shark's very low fecundity would render it susceptible to population depletion should fishing pressure increase in the future. Slender smooth-hound The slender smooth-hound or gollumshark ("Gollum attenuatus") is a species of ground shark in the family Pseudotriakidae. It is endemic to the waters around New Zealand, where it is usually found close to the bottom over the continental slope at depths of . An extremely slim, plain brownish shark reaching in length, the slender smooth-hound can be identified by its broad, flattened head
Spotless smooth-hound continental shelf and in semi-enclosed areas of sea at depths down to and possibly as deep as . It is found near the seabed, often over sandy substrates and is thought to feed on crustaceans and other benthic invertebrates. The spotless smooth-hound is viviparous. Males become sexually mature at a length of between and females at . Litter size varies between about five and sixteen pups which are nourished by yolk sac placentas. The gestation period is about ten months and the pups measure about at birth. Maximum recorded age is nine years. The spotless smooth-hound is used for human