The longnose spurdog (Squalus blainville) is a dogfish shark of the genusSqualus, found over continental shelves in all oceans, at depths of between 15 and 800 metres. They reach one metre in length.
Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN0-00-216987-8