[dey-nee-oh] 
| any of several cyprinid fishes of the genera Danio and Brachydanio, of India and Sri Lanka, often kept in aquariums. |
| da·ni·o (dā'nē-ō') n. pl. da·ni·os Any of various small, often brightly colored freshwater fishes of the genera Danio and Brachydanio, native to Asia and popular as aquarium fish. [New Latin Danio, genus name.] |
danio
any of several slender tropical fishes of the genera Danio and Brachydanio in the carp family, Cyprinidae. Danios are hardy and swim actively about in schools. They are generally some 4-5 cm (1.5-2 inches) long. Several are often kept in home aquariums. Among these are the zebra danio, or zebra fish (B. rerio), a popular species with lengthwise blue and yellow stripes, and the giant danio (D. malabaricus), a striped blue and yellow fish about 11 cm (4 inches) long.
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