Millet butterflyfish stripe runs from above the eye to the base of the operculum, and there is a large black patch on the caudal peduncle. This fish is endemic to the Hawaiian Islands and the Johnston Atoll, and is found down to depths of at least . Its habitats include coastal fringing reefs, outer reefs and lagoons. The millet butterflyfish is a schooling species found in mid-water that feeds on zooplankton. It also feeds opportunistically on polychaete worms and other small invertebrates on the seabed. Food is drawn into the mouth by rapid suction. It does not seem to be territorial but
Nemipterus randalli back fading silvery-pink on the belly, there are four pale yellow longitudinal stripes on the flanks, the upper stripe starts at eye level and runs to caudal peduncle. The other three stripes are close to each other and there is a yellow spot on the cheek and another on the operculum. They grow to a maximum length of 30 cm but are normally 5–20 cm. The dorsal fin is pale bluish in colour with a red margin and yellow markings clustered towards the base, the caudal fin also has a red margin. "Nemipterus randalli" is native to the western Indian