Description: Males: general body shape laterally compressed and moderately deep; small to medium sized species, maximum observed size 29.9 mm standard length; greatest vertical body depth in front of pelvic-fin origin and shallowest at mid-portion of caudal peduncle; greatest body width at pectoral-fin base with body progressively narrowing towards caudal-fin base; dorsal profile straight to slightly convex from snout to origin of dorsal fin; convex along dorsal-fin base, straight to slightly concave from base of dorsal fin to caudal fin; dorsal profile of larger males occasionally concave at nape; ventral profile convex from lower jaw to base of last anal-fin ray, straight to slightly concave on ventral midline of caudal peduncle; caudal peduncle relatively long, length 171-194% of its depth; anus directly in front of anal-fin origin (Ref. 127235). Head short, laterally compressed, deeper than wide, head width 76-80% of its depth; snout slightly rounded, smaller than eye diameter; mouth superior, oblique in profile; jaws not equal, lower jaw longer than upper, posterior end of corner of mouth at same level to centre of eye; premaxilla and dentary with many irregularly distributed conical teeth; orbit large, 43-47% of head length (Ref. 127235). Dorsal fin set rearwards, origin posterior to anal-fin origin, both fins originating posterior to mid-length of body; dorsal and anal fins rounded; dorsal fin with 8-10 rays, anal fin with 15-16 rays; pectoral fin subtriangular, insertion relatively high and posterior to margin of opercular opening; base oblique, upper fin rays placed anteriorly to lower fin rays, 10-11 rays; pelvic fin sub-abdominal; its origin slightly posterior to mid-length between insertions of pectoral and anal fins, almost reaching origin of anal fin; caudal fin large and truncate, with 12-13 branched rays, plus four or five dorsal and ventral procurrent rays (Ref. 127235). Scales cycloid, body and head entirely scaled, except for ventral surface of head; scales in midlongitudinal series 26-27, plus two or three small scales on caudal-fin base; transverse rows of scales in front of dorsal-fin origin 7; scale rows around caudal peduncle 12 (Ref. 127235). Frontal neuromast in shallow groove; cephalic sensory system at preorbital level in two discontinuous shallow grooves, with one and two neuromasts, respectively; infraorbital series with about a dozen small buttons; postorbital canal tubular with two pores; preopercular sensory systems tubular with seven pores; cephalic sensory system at supraorbital level in zigzag groove, usually with pronounced lobes, with three neuromasts, anteriormost one anteriorly displaced from the other two; whereas at supratemporal level in a strongly curved groove, with three exposed neuromasts, and groove connecting to pore of postorbital canal; mandibular canal in shallow open groove parallel to outer margin of lower jaw, with two exposed neuromasts (Ref. 127235). Females: body depth and head depth smaller than in males, body depth at pelvic-fin origin 25.0-25.2% of standard length vs. 26.8-28.9%, head depth 80-82% of head length vs. 83-85% respectively; head less laterally compressed than in males, head width 79-80% of its depth vs. 76-78% respectively; caudal peduncle shallower than in males, caudal peduncle depth 12.9-13.2% of standard length vs. 13.4-14.6%, caudal peduncle length 191-194% of its depth vs. 171-177% respectively (Ref. 127235).Colouration: Colouration of live males and females: scales on trunk with iridescent metallic blue, with a pattern of independent iridescent light blue spots along mid-longitudinal series and two or three series below on posteroventral portion of flank, creating an overall reflective blue body colouration; scales on dorsum above mid-longitudinal series completely grey, with sparse tiny blue iridescent dots; scales on abdomen from opercle to pelvic fin white to silver; head yellow to light brown-grey, snout and dorsal portion of head greyish brown, throat silver; exposed branchiostegal membrane white; iris silver, iridescent in upper portion; iridescent silver to blue blotch on postorbital opercular region; iridescent silver to blue humeral blotch on post-opercular region; dark grey blotches on scales of mid-longitudinal series; all fins hyaline; dorsal-fin membrane light grey along upper and lower margins in males; fin tips of some anal- and dorsal-fin rays occasionally with narrow light blue margin in females (Ref. 127235).