This beautiful nudibranch (Elysia diomedea) found in a tide pool on Playa Carbon on the Pacific coast of Costa Rica.

This species of nudibranch are one of the few marine animals that are able to photosynthesise. Incredibly, when this animal feeds on algae, some of the chloroplasts that it ingests remain in its tissues. It is then able to make use of the energy produced by the chloroplasts as they continue to photosynthesize. Because of this, the nudibranch is commonly found in shallow sunlit waters with this parapodia fanned out.

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