Monacanthus chinensis, 5.9 cm SL
(photo by Seishi Kimura)

Monacanthus chinensis, 7.7 cm SL
(photo by Ukkrit Satapoomin)

Monacanthus chinensis
(Osbeck, 1765)
Fanbellied Leatherjacket

D II + 28-30; A 27-30; P1 12.

Body very deep. Dorsal profile of snout concave. Pelvic terminus prominent, composed of 3 segments of encasing scales, movable dorsoventrally; ventral flap enlarged. Upper caudal fin rays produced into a filament. Color: body light brown with many irregular dark brown blotches. Size: maximum 38 cm. Distribution: west coast of Malay Peninsula and tropical West Pacific from Thailand eastward to New Guinea. Remarks: occurring in seagrass bed and rocky reefs in shallow waters.