Mniarogekko chahoua gets its common name from the moss or lichen-like pattern it displays. Colors range from rusty red and brown to green or gray. There has been some notation that color could possibly be a geographic indicator in this species as the geckos from the outer islands most often display the lighter gray patterns. It commonly reaches a snout to vent length (SVL) of 5.5 in (14 cm). It possesses a strong, well-muscled, fully prehensile tail and is not subject to dropping it as readily as some of its relatives.