Barred danio Nilwala River basin. Barred danio The barred danio ("Devario pathirana") is a fish belonging to the minnow family (Cyprinidae). Originating in Sri Lanka, this fish grows to a maximum length of 2 inches (6 cm). In the wild, the barred danio is understood to be critically endangered, but is freely available from captive-bred stock. Typically, the fish prefer water with a 6.0-8.0 pH, a water hardness of 5.0-19.0 dGH, and an ideal temperature range of 69-79 °F (20-26 °C). Its diet consists of annelid worms, small crustaceans, and insects. The barred danio is oviparous (an egg layer), and is found
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