V. litorea are consumed by the sea slug Elysia chlorotica .
V. litorea are are only partially digested by them in order to retain the photosynthetic chloroplasts in a process called kleptoplasty .
V. litorea are consumed by the sea slug Elysia chlorotica , but are only partially digested by them in order to retain the photosynthetic chloroplasts in a process called kleptoplasty .