The Mi-go are large, pinkish, fungoid, crustacean-like entities the size of a medium humanoid; where a head would be, they have a “convoluted ellipsoid” composed of pyramided, fleshy rings and covered in antennae. According to two reports in the original short story, their bodies consist of a form of matter that does not occur naturally on Deluge; for this reason, they are invisible to creatures who see with low-light or darkvision. Their crustacean-like bodies bear numerous sets of paired appendages. They possess a pair of membranous bat-like wings which are used to fly through the aetherial winds. The wings do not function well on Earth. Several other races in Lovecraft’s Mythos also have wings like these.