Danio and "D. rerio". About a century later (1916) and with many more species described in the meantime, the genus was split; the larger species into "Danio" and the smaller species into the genus "Brachydanio". In 1991, though, the two genera were recombined; most larger species formerly within the genus "Danio" have now been reclassified into the genus "Devario". Also, "Brachydanio" is now a junior synonym of "Danio". There are currently 27 recognized species in this genus: Danio Danio is a genus of small freshwater fish in the family Cyprinidae found in South and Southeast Asia, commonly kept in aquaria. They
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