They were banished beneath the Earth's crust a thousand years ago during the Kindling Wars.

They are a species of what appears to be anthropomorphic crab, standing about four feet tall and capable of speaking English.

"Cra-a-ab people, cra-a-ab people, taste like crab, talk like people."

Last known encounter: The stylish cast of "Queer eye for the straight guy" was discovered in all actuality to be crab people. They were trying to turn the male population weak with their metro-sexual teachings, making the human race that much easier to overthrow. They failed.