Costasiella kuroshimae—also known as a “leaf slug”,[1] or “leaf sheep”[2]—is a species of sacoglossan sea slug. Costasiella kuroshimae are shell-less marine opisthobranch gastropod mollusks in the family Costasiellidae.[3] Despite being animals they indirectly perform photosynthesis, via kleptoplasty.[4]
Just look at that little homie.
Sadly, it probably couldn’t keep up with your huge brain. Photosynthesis is really only useful for things that expend very little energy on wasteful things.