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.
there are other species suspected of doing the same, I would bet goddamn money that green aphids are capable of it as well
IIRC there's is a type of salamander that does the same thing.