Isn't That Precious- This planet appears to be little more than a large desert at first glimpse, but the planet is actually a thriving populated world where the civilizations, as well as the natives, are invisible and are considered quite ugly when visible.
The Inhabidants of Isn't that precious appear to be invisible but when covered in paint or a colored liquid substance they are revealed to be hideous mishapend creatures that kind of resemble patatos.