A kangaroo mouse or muad'dib in Chakobsa, is a small rodent from the planet Arrakis. It was associated in the Fremen earth-spirit mythology and its figure was visible on the planet's second moon, as well as on a constellation. This creature is admired by Fremen for its ability to survive in the open desert. Young Fremen are required to learn from their ways of survival. Paul Atreides took the name of Muad'Dib when he was welcomed into the Fremen tribes.