Have you ever heard of a leaf sheep? Contrary to their name, these adorable creatures are neither plants nor four-legged mammals. They’re actually a type of sea slug, and they’ve earned their affectionate “leaf sheep” nickname with their appearance.

In fact, it’s kind of surreal how much these water-dwelling creatures look just like tiny, grazing sheep. Leaf sheep sea slugs have a special ability, too. They can photosynthesize just like a plant. This is yet another reason their nickname is so accurate.