Inhabits lagoon and seaward reefs (Ref. 9710), found mainly in protected coastal waters and lagoons. Typically found in pairs in which males are much smaller than females (Ref. 48636). Feeds primarily on zooplankton and benthic algae (Ref. 4966). Has been reared in captivity (Ref. 35404, 35413, 35420). Associated with the anemone Entacmaea quadricolor (Ref. 5911).