GOBIIDAE Cryptocentrus cyanotaenia, 8.9 cm SL (Photo by Seishi Kimura) Cryptocentrus cyanotaenia Bleeker, 1853 Lagoon Shrimp Goby D VI+I, 10; A I, 10; P1 17-18; LR 92-95; PDS 24-27. Body elongate, compressed. Head slightly compressed; jaws subequal, large, extending beyond a vertical through posterior margin of eye; gill opening extending anteriorly beyond a vertical through preopercular margin. Pelvic fins united medially; frenum present. Scales cycloid; head breast and pectoral-fin base naked. Sensory canals and pores present on head; distinct transverse sensorypapillae rows on cheek; a pair of short longitudinal sensory papillae rows just behind chin. Color: numerous short diagonal blue lines on head; alternative yellow and red lines on anal fin. Size: 12.0 cm SL. Distribution: Indo-West Pacific. Remarks: found in muddy mangrove area; symbiotically associates with alpheid shrimps.