A rather slab-sided minnow. Yellowish-olive back with dark edgings on scales. Sides are silvery with blue reflections. Large young and adults have all membranes of the dorsal fin more or less uniformly dusted with fine, dark specks. Breeding males are a beautiful metallic blue with top of head and all fins (exept dorsal) bright red and have a pink vertical bar on body behind the pectoral fin.