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").
Madonna with the Fish his fish was an early type of baptism. Raphael leading Tobias always expresses protection, and especially protection to the young. The picture is believed to have been painted around 1512-14 to commemorate the introduction of Book of Tobit to the canonical books of the Roman Catholic Church. St. Jerome translated the Book of Tobit into Latin, which explains his presence on the right of Mary. It is currently held by the Museo del Prado, Madrid. Madonna with the Fish Madonna of the Fish, known also as Madonna with the Fish is a painting by the High Renaissance master Raphael. Mary