Biology/Natural History: Found in and around kelp beds. Eats the kelp itself and adhering bryozoans, diatoms, and detritus. May eat tunicate Cystodytes lobatus. Has two muscular waves of contraction on foot while crawling, which move from back to front of the foot and are out of phase with each other. Crawl rapidly away from some seastars. Snail covers shell with mucus which may aid in avoidinig capture by seastars.