GOBIIDAE Periophthalmus novemradiatus, 6.7 cm SL (photo by Ukkrit Satapoomin) Periophthalmus novemradiatus (Hamilton, 1822) Pearse�fs 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 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.