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").
Fish slice (kitchen utensil) Fish slice (kitchen utensil) In British English, a fish slice is a kitchen tool with a wide flat blade with long holes in it, used for lifting and turning food while cooking. In American English, this is known as spatula. It was originally a serving implement for fish, usually made of silver, antique examples of which commonly appear at auction. Fish slices were made of silver or Sheffield plate rather than steel to avoid the possibility of tainting the taste of the fish due a reaction between the fish and its lemon seasoning and the steel. After 1745 their outlines