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The Red Tail Rasbora is also known as the Black Line Rasbora, Bora Bora Rasbora and Brilliant Rasbora, and is a freshwater fish of the Rasbora fish family. The Red Tail Rasbora is a peaceful shoaling species and enjoys a planted aquarium in groups of 8 or more. Suited to beginner aquarists it is a hardy rasbora species.

Red Tail Rasbora's are naturally found in densely vegetated black water streams. They are a timid species and will gain confidence with lots of hiding spaces and in groups.


Features of Red Tail Rasbora's:

  • A silvery slender body with a distinct black line shadowed with orange from head to tail.
  • Red on base of a transparent tail
  • Male Red Tail Rasbora's are slimmer & brighter than females
  • Active during the daytime & rest at night
  • Grows up to 6cm

The Best Aquarium Size for Red Tail Rasbora's:

The minimum tank size for a small group of dwarf Rasboras is 25L. The Red Tail Rasbora will occupy the top to middle water column in the aquarium.

Due to their small size, smaller aquariums will accommodate this fish, however we always recommend going with larger aquariums if your budget allows. 

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

Tank Mate Compatibility:

The Red Tail Rasbora is a shoaling fish and should be kept in schools of 8 or more. This species finds security within the group. They are a timid species that do best with other small shy species of fish. 

Great tank mates for Red Tail Rasbora's include:

 Coburg Aquarium, specialize in a large range of species of live fish.

Feeding :

Red Tail Rasbora's have tiny mouths so keep this in mind when selecting food. We recommend feeding three times a day a combination of pellets or flakes, live or frozen food like brine shrimp, & bloodworms.

Check out our extensive range of aquarium fish foods.


Red Tail Rasbora Fish Tank Setup:

Aquarium Filtration

Naturally found in slow moving streams, mimic the Red Tail rasbora’s natural environment by using a good aquarium filter that won’t create strong water movements. They are sensitive to water changes and fluctuations in water quality, so ensure adequate filtration.

Browse aquarium filters here.


Aquatic Plants for Red Tail Rasbora's

The Red Tail Rasbora is naturally found in heavily vegetated water systems and finds security and comfort in heavily planted aquariums. It provides shade & spaces to hide to ensure happy fish. 

Interested in live plants for your aquariums? Browse live plants here.

Tank Decorations for Red Tail Rasbora's

Red Tail Rasbora's enjoy black water aquariums and acidic water. The colour of fish are enhanced when conditions are ideal and fish are less stressed. Add driftwood and natural decorations that release tannins to mimic their natural environment.

Check out our Aquarium Ornaments.

Substrate for Red Tail Rasbora's

Dark coloured substrates enhance the colour of the fish and help lower light levels, reducing stress. 

A variety of Substrates are available at Coburg Aquarium. 

Additional Information

Fish Keeping Snapshot :

Preferred Water Parameters :

Aquarium Set-up Service:

Our design team enables us to create the tank you desire, install your tank where you wish to and provide a maintenance service to ensure everything runs smoothly. We can create almost any aquarium from the small home aquarium to large commercial aquariums for offices, hotels or restaurants. Coburg Aquarium, Australia's leading aquarium shop.

Please contact us if you need any custom tank services.