This photo of a very tiny Elysia (less than 10 mm — around 1/3 “) was taken in a shallow protected area of North Shore, Maui. It is apparently a fairly common diurnal species that sometimes jerks and clicks its parapodia — and it is this movement that drew the attention of the photographer. It looks very much like the Elysia lobata, but it has an orangeish/pink spot on its head and submarginal lines that set it apart. See Sea Slugs of Hawaii for more a more detailed description and more photos.
Elysia Sp#2