Description of the Male of the Hawaiian Angelfish Genicanthus Personatus

Only four female specimens were available for the description of the Hawaiian angelfish Genicanthus personatus by Randall (1975). Since the eight other species of the genus are all sexually dichromatic, the existence of a male of different color was predicted. Two male specimens of this species were recently trawled at a depth of 51 m near Nihoa Island in the Leeward Hawaiian Islands. They were light gray with a broad black band across the base of the caudal fin like the females, but in sharp contrast to the females, the front of the head and most of the pectoral, dorsal, and anal fins were yellow-orange. Also, the males were more elongate, the depth 2.1 in SL, and the caudal fin was lunate instead of emarginate due to a prolongation of the lobes of the fin.