GOBIIDAE Bathygobius cocosensis, 2.9 cm SL (photo by Ukkrit Satapoomin) Bathygobius cocosensis Rüppell, 1830 Starry Goby D VI + I, 8-10; A I, 7-8; P1 16-20; LR 33-39; PDS 6-14. Body moderately elongate and compressed. Head subcylindrical; gill opening not extending anteriorly to a vertical through posterior margin of preopercle; mental flap well developed, slightly protruding posterolaterally; no flap-like projection at tip of anterior nostril; anterior margin of tongue notched. Upper part of pectoral fin with filamentous free rays; pelvic fins united medially; frenum present, with no distinct projection at middle of posterior margin. Scales ctenoid posteriorly, cycloid anteriorly; head naked. Sensory canals and pores present on head; longitudinal pattern of sensory papillae on cheek; uniserial transverse row of sensory papillae just behind chin. Color: head and body light gray blown dorsally, pale gray or white ventrally; a series of small black blotches on mid-lateral body. Size: 5.0 cm SL. Distribution: Indo-Pacific. Remarks: found in shallow rocky shores.