- Not to be confused with the Mi-Go Hominids.
The Mi-go are an alien species of creature that first appeared in the H. P. Lovecraft story "The Whisper in Darkness", also known as the Fungi from Yuggoth. The word "Mi-go" actually comes from "Migou", a Tibetan word for Yeti, and while the Mi-go do not actually look like the traditional Yeti, Lovecraft does equate them. The Delta Green RPG setting equates Mi-Go with Grey Aliens.
While the Mi-go are described being technically fungi, they bear a great resemblance to crustaceans, namely shrimp or crayfish. While the Mi-go are never actually seen by the protagonist in the original story, second-hand reports describe them as elongated creatures with segmented bands of muscles for a body and a mass of sensory cilia for a head, and a pair of ribbed wings that would not function in our atmosphere (in the original story, they allowed them to fly through the ether of outer space, a pre-Einsteinian concept). These creatures are roughly man-sized, and are even capable of disguising themselves as humans via a mask and concealing clothing. The Mi-go are capable of learning and speaking human languages.
The Mi-go have mastered various fields of science, and are especially adept at surgery, as can do things such as extensively modify their own bodies, or remove human brains while keeping both brain and body alive (this allows the Mi-go to transport Human allies off-world, as the brains can be allowed to see and communicate when hooked up to special machines) . The Mi-go apparently visit earth to secretly mine its mineral resources, and have set up outposts on the planet Yuggoth, a planet in our solar system equated with Pluto.