


LETTUCE SEA SLUG (Eysia crispata) ©Warrenphotographic.co.uk
The lettuce sea slug, is a large and colorful species of sea slug, a marine opisthobranch gastropod mollusk. It resembles a nudibranch, but it is not closely related to that order of gastropods. It is instead a sacoglossan.
This species lives in the tropical parts of the western Atlantic, the Caribbean faunal zone. This sea slug (in common with some other sacoglossans) has algal chloroplasts (from its seaweed food sources) functioning within its tissues, providing it with sugars. This unusual phenomenon is known as kleptoplasty.
This species is called the lettuce slug because it is often green in color, and it always has a very frilly edge to its parapodia. This makes the slug resemble the curly kinds of lettuce, such as the lollo rosso variety. The maximum length of this species is about 50 mm. The lettuce slug is extremely variable in color.
Fact Source: http://en.wikipedia.org/wiki/Elysia_crispata
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