Diagnosis: Small ‘Lampeye’ species with relatively long fins; dorsal and anal fins pointed, caudal fin truncated; adult males with long ventral fins that may reach to the 5th or 6th anal fin ray; dorsal fin with 6-9 rays, anal fin with 10-13 rays; displacement between the dorsal and anal fins 1/7-9; scales on mid-longitudinal series 26-29 (Ref. 57259).

Colouration: Male colouration: translucent grey to pale olive overall colour with two longitudinal lines, consisting of large, light blue, blue-green or green iridescent spots, on the lower half of the body; upper line just below mid-body, lower line parallel to the lower body profile; a third, shorter line of iridescent spots may be present between the two prominent lines; dorsal and anal fins are pale olive to yellow, occasionally with an irregular pattern of red or white spots; the margins of these fins are usually marked by an intensification of the fin colour, although a white or orange-red margin may also be present; the pattern of the caudal fin varies on population level and is yellow to pale olive with light blue iridescent spots; an irregular pattern of yellow, orange or red spots is usually present on the caudal fin and the margin may be white, yellow or orange-red (Ref. 57259). Female colouration: translucent grey to pale olive with some light blue iridescent spots on the sides arranged in horizontal lines; the scales on the back and upper parts of the sides usually have narrow brown margins; all fins are colourless (Ref. 57259). Both sexes have a strongly reflective light blue spot in the upper part of the eye iris (Ref. 57259).