The rough-head whiptail (Coelorinchus aspercephalus), also known as the oblique banded rattail, is a species of rattail found around New Zealand including islands to New Zealand's south, at depths of between 30 and 300 m. Its length is between 15 and 35 cm.
References
Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982)