GOBIIDAE Cryptocentrus species 2, 4.5 cm SL (male; photo by Ukkrit Satapoomin) Cryptocentrus species 2, 5.0 cm SL (female; photo by Ukkrit Satapoomin) Cryptocentrus species 2 Ventral-banded Shrimpgoby D VI+I, 10; A I, 9; P1 16-18; LR 75-82; PDS 0-13. Body elongate, compressed. Head compressed; jaws extending posteriorly beyond a vertical through posterior margin of eye; gill opening reaching anteriorly to a vertical through preopercular margin. Pelvic fins united medially; frenum present. Scales on body cycloid; head naked. Sensory canals and pores present on head; distinct transverse sensory-papillae rows on cheek; a pair of short longitudinal sensory papillae rows just behind chin. Color: head and body yellowish gray, beige or reddish yellow, darkened dorsally; a series of 5-7 faint dusky blotches on midlateral body; dorsum may be with faint dusky reticulation; two horizontallyelongate dusky blotches on anterior part of cheek; minute bright blue dots scattered on head; pelvic fin with a distinct barred pattern. Size: 7.0 cm SL. Distribution: Andaman Sea and West Pacific. Remarks: found in protected bays with sandy-mud bottoms and rubbles; symbiotically associated with alpheid shrimps.