APOGONIDAE Apogon cookii, 5.3 cm SL (photo by Ukkrit Satapoomin) Apogon cookii Macleay, 1881 Cook's Cardinalfish D VII+I, 9; A II, 8; P1 15; LL 24. Body oblong, moderately deep and compressed; lateral line well developed, extending posteriorly to caudal-fin base. Snout moderately pointed. Posterior margin of preopercle serrated. No enlarged caninoid teeth on jaws. Base of anal fin subequal to base of second dorsal fin in length; caudal fin emarginate. Color: head and body pale with 6 longitudinal dark brown stripes with various widths; 3rd stripe short and extends from dorsal margin of eye to, or slightly beyond, a vertical through origin of second dorsal fin; a dusky rounded spot (larger than pupil) at caudal-fin base; fins subtranslucent or a little tinged with red. Size: 8 cm SL. Distribution: Indo- Pacific. Remarks: inhabits rocky or coral reefs. Randall (2005) placed this species in genus Ostorhinchus, previously treated as subgenus of Apogon.