PTERELEOTRIDAE Parioglossus palustris, 1.7 cm SL (photo by Koichi Shibukawa) Parioglossus palustris (Herre, 1945) Borneo Hoverer Goby D VI + I, 16-17; A I, 16-19; P1 16-19; LR 78-89; PDS 0. Body elongate, compressed. Head compressed; lower jaw slightly projecting anteriorly beyond uppe r j aw; gi l l opening relatively narrow, not extending anteriorly to a vertical line through middle of operculum. Middle some spine of first dorsal fin elongate in male, whereas no elongate spines in female; pelvic fins separated; caudal fin rounded or slightly emarginate. Scales on body small cycloid, embedded and non-imbricate; head naked. Sensory canals and pores present on head; reduced transverse pattern of sensorypapillae rows on cheek. Color: head and body pale gray, without dusky stripes; distinct black spot at ventral half of caudal fin. Size: 2.8 cm SL. Distribution: Andaman Sea and West Pacific. Remarks: found around roots of mangrove trees in brackish estuaries at high-tide hour; free swimming species, forming aggregations mixed with some congeners.