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Melanotaenia fluviatilis (Murray River Rainbowfish)

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A variable but widely sold species, this is one of the rainbowfish most likely to be traded merely as an "Australian rainbowfish".

The basic colour is silvery blue, with longitudinal green, blue, and red stripes along the flanks. Males are more strongly coloured and usually have black edges to the dorsal and anal fins.

Fish information (behaviour and breeding):

Rainbowfish invariably make good companions for similar size, non-aggressive tankmates. They are hardy and long-lived, and tend to do well in hard, alkaline water making them a good choice for fishkeepers without access to the soft water preferred by barbs and tetras.

Breeding rainbowfish is generally not difficult. Eggs are scattered over open, sandy substrates and take about a week to hatch. Conditioning the parents on a good diet of live and frozen foods is important. The fry, once free swimming, will take small pond foods and brine shrimp nauplii.

Family Group: Rainbow fish
Distribution Australia
Temperature 24-28 C
Size Up to 10 cm, normally smaller
Water Parameters Adaptable, but avoid extremes
Water PH 7.0-7.5

Useful sources of information:

If you would like to learn more about what are some of the most colourful fish in the hobby the best refernce guide is the Aqualog All Rainbows and Related Families which is a fantastic guide to these fish covering 313 species with more than 700 colour photographs. To buy a copy click here