Lettuce sea slug, Elysia crispata Blue Spot Sanddiver It can be housed with

It can be housed with some invertebrates

algae present in or near its home

as occasional puffer specimens will nip and leave their tell-tale circularholes in the fins

(Do not boil water)

Lettuce sea slug, Elysia crispata Blue Spot Sanddiver It can be housed withElysia crispata, common name the lettuce sea slug or lettuce slug, is a large and colorful species of sea slug, a marine gastropod mollusk. The lettuce slug resembles a nudibranch, but it is not closely related to that clade of gastropods; it is classified as a sacoglossan. The sea slug eats green algae , but not all of the algae they eat is digested. Some of the green algae gets shuttled off to make a home in those fleshy appendages (called