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Galaxy Rasbora, also known as the celestial pearl danio, is a small freshwater fish species that is highly popular among aquarium enthusiasts. It belongs to the Cyprinidae family and is native to Southeast Asia, specifically the Nanay River basin in northern Myanmar.

The Galaxy Rasbora is a peaceful and social fish that prefers to be kept in schools of at least six individuals. It has a distinctive appearance with a black background, bright blue iridescent spots on its body, and a red-orange coloration around its fins. The fins of males are more colorful and elongated than those of females.

Coburg Aquarium's Live Fish and Aquarium Products shipped Australia Wide.

Features of Galaxy Rasbora:

  • Galaxy Rasboras typically grow up to 2.5 cm in length,
  • Their lifespan is usually around 3-4 years.


The Best Aquarium Size for Galaxy Rasbora:

The ideal aquarium size for Galaxy Rasboras depends on the number of fish you plan to keep. Since they are small fish, they do not require a large aquarium, but they do require enough space to swim around and school comfortably.

As a general rule, a minimum tank size of 45L is recommended for a school of 6 Galaxy Rasboras. However, a larger tank would be even better as it will provide more swimming space and enable you to add more fish or other aquatic species.

After an Aquarium for your fish? Browse Aquarium Tank Selection here.

Tank Mate Compatibility:

Galaxy Rasboras are peaceful and social fish that do well in a community aquarium with compatible tank mates. Avoid aggressive or territorial fish. It is important to avoid adding aggressive or territorial fish to the same aquarium as Galaxy Rasboras as they may bully or harm the Rasboras. Examples of unsuitable tank mates include Cichlids, Gouramis, or other fish that are known to be territorial or aggressive.

In general, it is important to choose tank mates that share similar water parameters and are peaceful and compatible with Galaxy Rasboras to create a harmonious and healthy community aquarium. Shrimp and snail are also good accompanies. 

 Coburg Aquarium, specialised in different species of live fish.


Feeding :

Galaxy Rasboras are omnivorous and feed on a variety of foods, including flakes, pellets, and live or frozen foods such as brine shrimp and bloodworms.

It is important to avoid overfeeding Galaxy Rasboras as this can lead to health problems such as obesity and digestive issues. Feed them a small amount of food 2-3 times a day, and only give them what they can consume in a few minutes. If there is any uneaten food, remove it from the aquarium to prevent it from polluting the water.

In Coburg Aquarium online, we stock a variety high quality fish food for your choice.

Search fish food in our High Quality Fish Foods collections.


Galaxy Rasbora Tank Setup:

Aquarium Filtration

A 20-25% water change every two weeks is a good starting point, but adjust as necessary based on the aquarium's specific needs. Make sure the filter matches with your tank size.

Here are some great ones to consider:


Adding live plants to your Galaxy Rasbora aquarium can provide a natural and aesthetically pleasing environment for the fish. Plants can also provide hiding places for the Rasboras, as well as a source of food and oxygen. Here are some plant options that are suitable for Galaxy Rasbora aquariums:


  • Java Moss 
  • Anubias
  • Cryptocoryne
  • Amazon Sword
  • Water Wisteria

    Plants are beneficial in helping to maintain good water quality and adding enrichment to a fish’s diet. Prefers some dense planting with some floating plants and open swimming areas.

    Interested in Live Plants for your aquariums? Click here to see more Fish Live Plant 


    Ideal Ornaments for your fish tank:

    After more nice quality decorations?  Check our Aquarium Ornaments.


    Galaxy Rasboras do not have specific lighting requirements, but they will benefit from a well-lit aquarium that supports the growth of live plants. A good rule of thumb is to provide 1 to 2 watts of lighting per gallon of water.


    Sand is a popular substrate option for Galaxy Rasbora aquariums, as it provides a natural look and is easy to clean. Gravel is another common substrate option that is available in a variety of colors and sizes.

    A variety of Substrates are available at Coburg Aquarium. 

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    Nishma B.
    Australia Australia

    Favourite fish.

    Hi. Two of the seven died but the aquarium was very easy to deal with and the remaining five are doing very well.