This colour form of the Doublayi rainbow has been most popular in the aquarium hobby. It has the most intense colours of all the Doublai colour morphs.
The scales are almost all metallic blue, as show in the close-up view of their scales above.
These fish come from South East Queensland and can tolerate much lower temperatures than the species of rainbows from the far northern parts of Australia. In their natural habitat the water temperatures during winter can be as low as 15C in some of the smaller water holes.