McCosker's grenadier (Spicomacrurus mccoskeri), first described by Iwamoto, Shao & Ho, 2011 is a medium-sized fish in the family Macrouridae (order Gadiformes). Adults typically reach 19.20 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 650 to 710 metres. It occurs in Deep-water waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.
This 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 .: elongated; Cross section: oval.
Behavioural data for McCosker's grenadier is currently being reviewed.
Marine; bathydemersal; depth range 650 - 710 m . Deep-water Pacific Ocean: off Chesterfield Plateau, Coral Sea.
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