Macrourus berglax shrimps, amphipods, polychaete worms, bivalve molluscs, isopods, brittle stars, other echinoderms and comb jellies. The roughhead grenadier is a slow growing fish. The females mature at an age of about 14 years and a length of while males reach maturity at a length of . The potential fecundity of the female is 17,000 to 56,000 eggs. The eggs are laid in batches and spawning takes place at any time of year, with a peak in late winter and early spring. The roughhead grenadier is landed as a by-catch when fishing for Greenland halibut ("Reinhardtius hippoglossoides") and Atlantic halibut ("Hippoglossus hippoglossus").
Western Flat, South Australia Western Flat, South Australia Western Flat is a locality in the Australian state of South Australia located in the state's south-east within the Limestone Coast region about south east of the state capital of Adelaide and about south of the municipal seat of Bordertown. Boundaries for the locality were created on 16 March 2000 for the “long established name.” Its name is ultimately derived from the ‘Western Flat Run’ pastoral lease which was established in 1868 by T. Brown. The land use in the locality is ‘primary production’. The 2016 Australian census which was conducted in August 2016 reports that