Not technically a nudibranch, but I love him and make the rules so. This moving ruffle is able to take chloroplast from the algea it eats and incorporate it into itself and become solar powered! While the slug is not able to sustain itself solely on its photosynthesis stealing antics, it's still a pretty rad ability that this loofah look alike can pull it off at all. The biggest they get is 5 cm, the size of a lime! 10/10