GOBIIDAE Periophthalmus novemradiatus, NSMT-P 65999, 4.3 cm SL Periophthalmus novemradiatus (Hamilton, 1822) Pearse's mudskipper D IX - XI - 13 - 14; A 12 - 14; P1 11 - 14; LR 61 - 76; PDS 20 - 28. Body moderately elongate, compressed. Head slightly compressed; profile of snout steep; dermal cup-like process developed beneath eye; single row of conical teeth on each jaws. Pelvic fins almost separated; frenum (= membrane uniting pelvic spines) present. Scales on head and body cycloid. No sensory canals and pores on head. Color: head and body gray brown with indistinct dusky mottles; first dorsal fin with several dusky spots tinged with red, in addition to broad distal submarginal black band. Size: 10.0 cm SL. Distribution: eastern Indian Ocean, Andaman Sea and West Pacific. Remarks: found in intertidal zone of mangrove areas.