Occasional specimens could be red. The frilly margin running around the perimeter of the shell is called the epipodium . A certain amount depends on what we can keep for a reasonable length of time in the tanks but most flat red or green algae seem suitable. Palmaria, the red seaweed that looks like a red Sea Lettuce is a favourite. The adult specimen fed extensively on microalgae.
Juveniles eat microalgae, diatoms, bacterial film.
Adults consume brown algae, including kelps, but will eat almost any seaweed. In late summer. The sexes are separate and fertilisation is external. It takes over 3 years for the mollusc to attain a breeding size of 40 mm. Their life span does not exceed 6 years.