The Arctic Moonsnail is an arctic circumboreal species. Adult Moonsnails eat bivalves and sometimes herring eggs.  The moons (Naticidae) are equipped with a sharp seven rowed radula, which moving like an up-escalator, rasps a hole into the shell of their prey. The snail then introduces a little trunk (proboscis) that sucks out the soft parts of the victim. This feeding method is called boring, and can occur at a rate of about 0.5 mm per day. A hole that is wider at the top than at the bottom (countersunk) is worn by the rasping action of the radula. Chelating agents, acids and enzymes aid in the deterioration of the shell. These are secreted by a disc-shaped gland that is located on the ventral surface of the proboscis. The Arctic Moonsnail is a deeper dweller than the Lewis' Moonsnail and it will frequently remain buried during daylight hours.