Centroscymnus cryptacanthus Regan, 1906 The roughskin dogfish (Centroscymnus owstonii) is a sleeper shark of the family Somniosidae, found around the world on continental shelves in tropical, subtropical and temperate seas, at depths of between 100 and 1,500 m.[2][3] It reaches a length of 121 cm.

[6] Centroscymnus owstonii holds importance in its ecosystem as a predator and component of the upper slope assemblage, as it maintains an ecological balance in deep-sea communities.

[7] As a top predator, the prey of C. owstonii consists mainly of fishes, with small proportions of crustaceans, squid and salps.

The fish prey were predominantly hoki, with some mesopelagic sea bream (B. australis and B. brama), slender tuna (Allothunnus fallai), and a demersal rattail (Coelorinchus bollonsi).

[8] The fish is named in honor of Alan Owston (1853‒ 1915), an English businessman, a yachtsman, and a collector of Asian wildlife, who obtained the holotype.