Rough-head whiptail
Encyclopedia
The rough-head whiptail or oblique banded rattail, Caelorinchus aspercephalus, is a rattail
Rattail
Grenadiers or rattails are generally large, brown to black gadiform marine fish of the family Macrouridae...

 of the genus Caelorinchus
Caelorinchus
Caelorinchus is a genus of rattails currently with 114 described species.-Species:* Surgeon grenadier, Caelorinchus acanthiger* Caelorinchus acantholepis* Aconcagua grenadier, Caelorinchus aconcagua* Caelorinchus acutirostris...

, found around New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

including islands to New Zealand's south, at depths of between 30 and 300 m. Its length is between 15 to 35 cm.
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