Elysia crispata, or the lettuce sea slug, is a marine gastropod known for its frilly, lettuce-like appearance and its ability to perform photosynthesis. This “solar-powered” slug steals chloroplasts from the algae it eats, which then continue to produce energy for the slug. It is a large, colorful species found in Caribbean and Gulf of Mexico reefs and is often used in the aquarium trade as a cleanup crew member. #reeftank #saltwateraquarium #aquariumhobby #aquariumlife #fishtank #marineaquarium