HomeFish encyclopediaRay-finned fishesCodsGrenadiers or rattailsMcCosker?s grenadier McCosker?s grenadier (Spicomacrurus mccoskeri) Scientific name: Spicomacrurus mccoskeri Iwamoto, Shao & Ho, 2011 The McCosker?s grenadier (Spicomacrurus mccoskeri) is a marine fish of the family Macrouridae. Native range: Pacific Ocean, off Chesterfield Plateau. BiologyThis species is distinguished by its shallow, cylindrical body and head, with greatest body width slightly less than greatest depth; suborbital depth 5-6 into orbit diameter; 3.5 scale rows below origin of second dorsal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSpicomacrurus mccoskeriFamilyMacrouridae (Grenadiers or rattails)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Depth range650–710 m (2133–2329 ft)EnvironmentMarine; demersal; depth range 650 - 710 mClimateDeep-waterDistributionPacific Ocean: off Chesterfield Plateau.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026