Cook's rattail, Coelorinchus cookianus, is a species of rattail found around New Zealand at depths of between 250 and 900 m. Its length is between 10 and 25 cm. References Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) Macrouridae Endemic marine fish of New Zealand Fish described in 1980