Share us: facebook bookmark google plus bookmark twitter bookmark stumbleupon bookmark reddit bookmark digg bookmark
Cookies seem to be disabled in your browser, therefore this website will NOT work properly! Please, consider enabling Cookies in order to maximise your user experience while browsing.
Recent discussions at Aqua-Fish+
  1. charmi1 at How to take care of Kuhli loaches with forum and images on
  2. charmi1 at How to breed and take care of Dwarf gouramis with forum on …display more of the recent discussions
  3. charmi1 at A DIY external filter for a 26 gallon or bigger aquarium on
  4. charmi1 at An article on keeping Giant Pufferfish with forum on
  5. charmi1 at Tetrafin Flakes Review on
  6. charmi1 at Tips for choosing the first aquarium and accessories on
  7. charmi1 at Simple Aquascaping on
  8. charmi1 at Power Filters for Aquariums on
  9. charmi1 at Setting up a Tropical Fish Tank on
  10. charmi1 at Review of Magnum and Penguin Aquarium Filter on
Australian rainbowfish - Melanotaenia fluviatilis

Australian rainbowfish - Melanotaenia fluviatilis

Scientific name: Melanotaenia fluviatilis

Common name: Australian rainbowfish

Family: Melanotaeniidae

Usual size in fish tanks: 9 - 11 cm (3.54 - 4.33 inch)


Recommended pH range for the species: 6.5 - 7.5

Recommended water hardness (dGH): 4 - 14°N (71.43 - 250ppm)

0°C 32°F30°C 86°F

Recommended temperature: 22 - 26 °C (71.6 - 78.8°F)

The way how these fish reproduce: Spawning

Where the species comes from: Oceania

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Middle levels


Australia; Australian rainbowfish are to be found in New South Wales and Queensland.


The expected life span for Melanotaenia fluviatilis is 5-8 years.

Short description

Melanotaenia fluviatilis are classed as hardy and make a good addition to a community tank. Always use a tight fitting lid as they are good jumpers. They are a schooling species so a group of these should be housed together, they also love planted aquariums but they also require a lot of swimming space. Planting should be restricted to the sides and rear of the aquarium to keep the front clear purely for this purpose. One tip to get the fish to display a brighter colouration is to use a darker substrate and add some floating plants to dim the lighting. The water quality needs to be kept high so always perform regular water changes.

The Rainbowfish species are generally peaceful so should be housed with other peaceful tank mates if you wish to set up a community aquarium.

Food and feeding

Quality flake can be used for the staple diet; Australian rainbowfish should also be given treats of blood worms and brine shrimp. Always make sure that any food given is broken down into small pieces as Rainbowfish may appear to have large mouths but the throat area is relatively small and food can get stuck in there if too large thus choking the fish.


Males will be slightly larger and more colourful.


A well planted tank should be used for breeding purposes. The water should be alkaline and use an air driven sponge filter for greater control of the water flow. The fish will pair after a lot of chasing about and spawning will take place at day break. The spawning may take a few days for all of the eggs to be laid, but once complete the parent should be removed. The eggs will be attached to the plants by fine threads and should hatch after 7-8 days. Raising the fry can be tricky and you may experience a high mortality rate, raising the fry in a separate tank should help, performing daily water changes and strict cleaning regimes. Initially, the fry should be fed on Infusoria, as they grow newly hatched brine shrimp can be given. The growth rate of the fry will be slow.

Always check the breeding tank for new batches of eggs as spawning will be repeated over several weeks.


Thanks to Sayer who has allowed us to use his picture!

Australian Rainbowfish

Did you know?

Login, please!

All comments must be submitted by registered members. Please, click this link to login or register!

Please, verify whether your login and password are valid. If you don't have an account here, register one free of charge, please. Click here to close this box.

You have been logged out successfully! This box will close automatically!

Something went wrong during processing your message, please try again!

Your message has been sent, thanks a lot!

Page has been saved, refresh it now, please!

The page has been created, you will now be redirected!

URL already exists!

Path to the photo is not unique!

Really delete this page from the database?

The page has been removed successfully, you will be redirected now!

The page couldn't be deleted!!

Unfortunately this page doesn't allow discussion. Please, find any other page that fits your area of interest as over 99% of our pages allow discussion. The reason why no discussion is allowed here is this page is too general. Thanks a lot for understanding! Click here to search, please!

Really delete this comment from the site?

Really delete this image from the site?

Really delete this image from the site?

Selected comment has been removed successfully!

Selected image has been removed successfully!

Either login or email address is required

Account has been recovered, please check your email for further instructions