Sight of Rainbowfish is a delight for aquarists to watch. The variety of colours they change while swimming, truly justify their name. Their popularity is not unknown as they have been one of the favourite species of fish since the start of last century. The factor that works well for them is that they are easy and peaceful species to keep, even for the beginners.
Rainbowfish have an exuberant and unique appearance. They exist in charismatic iridescent colours that change with the change in the way and angle light reflects upon them. Males and mature fish sport more vibrant colours than their younger and female counterparts. The length of different varieties of Rainbowfish ranges between 3 cm. and 15 cm. (1.2–6 inches).
Rainbowfish belong to a subfamily named Melanotaeniidae and are generally found in Australia, New Guinea, and some of the South East Asian Islands as well.
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