Elysia ornata (Swainson, 1840) [Thallepus]
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Elysia ornata has usually a translucent green colour with a black
parapodial margin and a submarginal yellowish-orange band. The tips of
the rhinophores often have the same colour bands. There are also numerous
black and white dots all over the body. Pretty similar is Elysia
More information on Elysia ornata are on
Bill Rudman's Sea-Slug Forum!