POMACENTRIDAE Neopomacentrus cyanomos, 6.4 cm SL (photo by Ukkrit Satapoomin) Neopomacentrus cyanomos (Bleeker, 1856) Regal Damoiselle D XIII, 11-12; A II, 11-12; P1 17-18; LLp 17-18. Body relatively slender, compressed. Posterior margin of preopercle weakly serrate. Ventral margin of suborbital concealed by scales. Teeth on jaws biserial, incisor-like. Caudal fin forked, with filamentous upper and lower lobes; no conspicuous projecting spine-like rays at upper and lower edges of caudal-fin base. Color: head and body dark brownish gray; a black blotch (subequal or slightly larger than pupil) around dorsal end of gill opening; a minute black spot at dorsalmost part of pectoral-fin base; posterior part of dorsal fin pale or yellow; caudal fin pale or yellow, with black dorsal and ventral margins. Size: 7.0 cm SL. Distribution: Indo-West Pacific. Remarks: found around patch reefs in protected bays with sandy-mud bottom; feeds on plankton in aggregation.