APOGONIDAE Apogon hyalosoma, 7.8 cm SL (photo by Ukkrit Satapoomin) Apogon hyalosoma Bleeker, 1852 Humpbacked Cardinalfish D VI+I, 9; A II, 8; P1 14; LL 24-25. Body deep, compressed; lateral line well developed, extending posteriorly to caudal-fin base. Snout moderately pointed; dorsal profile of head distinctly concaved, forming hump-back appearance. 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 gray dorsally, becoming silvery ventrally; a distinct, large (about size of eye) black spot at caudal-fin base; fins transparent, exclusive of anterodorsal margin of first dorsal fin black. Size: 12 cm SL. Distribution: Western Central Pacific. Remarks: inhabits estuaries, especially mangrove areas.