Three black bands, black ventral fin.
Size : 8 cm
Habitat : Shallow lagoons, protected patch reefs and bays, 0.5-20 m. Hovers in loose groups just above branch coral such as Acropora and Pocillopora and feeds on zooplankton from the water. When disturbed, instantly flees between the coral branches.
Distribution : Red Sea and East Africa to SW Japan, Micronesia, Line Islands and French Polynesia.