The family Naticidae makes an egg sandwich, termed a sand collar, of  two layers of eggs mixed with copious amounts of mucus then surrounded by a layer of sand. The U-shaped collar of the Arctic Moonsnail is about 5 cm in diameter , and is seen in Alaska late March through early May. The non-feeding veligers incubate within the sand collar until it disintegrates. The pelagic larvae feed on micro-algae, and the juveniles have been seen to eat ostracods, a tiny bivalved crustacean. The life-span of the Arctic Moonsnail is unknown.