Elysia viridis
Photographer: Photo: Fredrik Pleijel
Elysia viridis (English name sap-sucking slug) is shell-less slug that feeds on green algae and extracts the chloroplasts. These stolen chloroplasts, also referred to as cleptoplastids, then continue to photosynthesize to the benefit of the slug. The specimen on the picture is about 2 cm long.
