Danio erythromicron DNA sequence data showed that "Microrasbora erythromicron" was related to "Danio", and recommended moving this species to that genus. Later molecular analysis confirmed its placement within the genus, with its closest relatives being "Danio margaritatus" and "Danio choprai". Danio erythromicron Danio erythromicron, often known as emerald dwarf rasbora, is a species of cyprinid fish which is endemic to Inle Lake in Myanmar. In 1999, it was suggested that the species be transferred to the genus "Danio" based on morphological data, but it was cautioned that more research would be necessary. A phylogenetic analysis of "Danio" found it indeed close to
Danio margaritatus with a markedly blunt snout, measuring just 2–2.5 cm standard length. The body is about three times as long as it is high. In general shape, it resembles "Danio erythromicron" more than any other known species. This species shows some sexual dimorphism: males have a bright-blue background color (dull blue-green in females), and their fins are more brightly colored. The tail end of their bodies (the caudal peduncle) is also higher than in females. The body is sprinkled with small, pearly dots. The back is bronzy green, and the belly in females is yellowish-white. The gill covers are transparent, letting