It was found in 1966 in the Rio Grande River of Brazil. Its body is similar to the Silver Arowana. The only difference occurs during the infant period, when its body is slightly black and this will fade gradually as the fish grows. The scales will then become silver in colour while each fin will turn into blue colour. When it grows very big, its colour will incline to black with purple and green.
This kind of fish is easily frightened and thus is now considered a protected species in Brazil.
This kind of fish is easily frightened and thus is now considered a protected species in Brazil.
