Photosynthetic Animals

[auroraglacialis]

Pierce emphasized that this green slug goes far beyond animals such as corals that host live-in microbes that share the bounties of their photosynthesis. Most of those hosts tuck in the partner cells whole in crevices or pockets among host cells. Pierce’s slug, however, takes just parts of cells, the little green photosynthetic organelles called chloroplasts, from the algae it eats. The slug’s highly branched gut network engulfs these stolen bits and holds them inside slug cells

It also says that the slugs can actually make chlorophyll themselves. That really is special. Though they seem to also eat algae a lot, so it is not that they really only live on photosynthesis...