Challengers of Olympus
The “Mi-go” are large, pinkish, fungoid, crustacean-like entities the size of a man; 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 Earth; for this reason, they do not register on ordinary photographic film. They are capable of going into suspended animation until softened and reheated by the sun or some other source of heat. They are about five feet (1.5 m) long, and their crustacean-like bodies bear numerous sets of paired appendages. They possess a pair of membranous bat-like wings. The Mi-Go are extremely technologically advanced and seek to use the earth for its resources. They have been known to study and experiment on humans for unknown purposes. Their moral system is completely alien to humanity.