The threatened demersal spikedace (Meda fulgida) is endemic to the Gila River system generally at elevations of 1800 to 2000 meters. This taxon is slender in form with a pointed snout and total body length of about eight centimeters. Coloration is olive-grey to brown above, with silvery sides that frequently exhibit blue flashes, accompanied with black speckling on the back and upper side. Breeding males manifest a bright, brassy yellow head and fins. Preferred spikedace habitat consists of moderately flowing streams with sand or gravel bottom; the species is threatened by stream channelization and adverse water quality impacts.