GOBIIDAE Oxyurichthys papuensis, 4.5 cm SL (photo by Ukkrit Satapoomin) Oxyurichthys papuensis (Valenciennes, 1837) Frogface Goby D VI+I, 12; A I, 13; P1 22-23; LR 69-78; PDS 0. Body elongate, compressed. Head slightly compresed; low raised cutaneous ridge along predorsal midline; small cutaneous bump on posterodorsal surface of eye; jaws subequal; single and 3-4 rows of teeth on upper and lower jaws, respectively; gill opening not extending anteriorly to a vertical through preopercular margin. No elongate and filamentous spines on dorsal fins; pelvic fins united medially; frenum present; caudal fin lanceolate, longer than head. Scales on body cycloid anteriorly, ctenoid posteriorly; head naked. Sensory canals and pores present on head; distinct transverse pattern of sensory-papillae rows on cheek. Color: head and body pale grayish brown, with a series of several large and small dusky blotches on midlateral body; distal margin of each scale on nape and dorsum dusky; a shadow-like dusky blotch beneath eye; crescentshaped dusky mark on base of pectoral fin. Size: 10.0 cm SL. Distribution: Indo-West Pacific. Remarks: found on muddy bottom in protected bays.