HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsCook's rattail Cook's rattail (Coelorinchus cookianus) Scientific name: Coelorinchus cookianus McCann & McKnight, 1980 The Cook's rattail (Coelorinchus cookianus) is a marine fish of the family Macrouridae. Native range: Southwest Pacific, endemic to New Zealand. Species factsScientific nameCoelorinchus cookianusFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Depth range446–1175 m (1463–3855 ft)EnvironmentMarine; benthopelagic; depth range 446 - 1175 mClimateTemperateDistributionSouthwest Pacific: endemic to New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026