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Boesemani Rainbow - Small 4 cm to 5 cm  limited stock now available at Melbourne Tropical Fish
Photos depicts adult fully grown fish. Please note that fish supplied are Juvenile and smaller in size,  showing some colour,
Species – Melanotaenia boesemani
Common Name – Boesemani Rainbow
Origin – Vogelkop Peninsula of Western New Guinea
Diet – Omnivorous
PH Range – 6.5 – 8
Temperature – Tropical and Coldwater 21°c – 26°c
Breed Type – Egg Scatterer
Current Size – approximately 5cm (Grows to approximately 11.5cm)
Sex – Un-sexed


Boesemani Rainbowfish (Melanotaenia boesemani): A Stunning Freshwater Species for Your Aquarium

The Boesemani Rainbowfish, scientifically known as Melanotaenia boesemani, is a captivating and vibrant freshwater fish species that has become a popular choice among aquarium enthusiasts. Renowned for its stunning colours, peaceful temperament, and relatively easy care requirements, this fish offers a unique and eye-catching addition to your home aquarium.

Appearance and Colouration:

Boesemani Rainbowfish are renowned for their vibrant and mesmerising colours, making them a focal point in any aquarium setup. These fish exhibit a sleek and elongated body shape, with males typically being more colourful than females. The males boast a striking combination of iridescent blues, greens, and yellows, while the females display more subdued colours.

Aquarium Setup:

To provide the best environment for Boesemani Rainbowfish, consider the following:

  1. Tank Size: A spacious aquarium of at least 30 gallons is recommended to allow these active swimmers ample room to explore and display their vibrant colors.

  2. Water Parameters: Maintain a pH level between 7.0 and 8.0 and a water temperature range of 75°F to 82°F (24°C to 28°C) to replicate their native habitats in Papua New Guinea.

  3. Decor: Create a natural and aesthetically pleasing environment with live plants, driftwood, and rocky hiding spots. These elements mimic their natural habitat and provide places to explore and seek shelter.

  4. Filtration: Efficient filtration is crucial to maintain water quality and clarity, as Rainbowfish are sensitive to poor water conditions.

  5. Tank Mates: Boesemani Rainbowfish are peaceful by nature and can coexist with other non-aggressive species. Suitable tank mates include other Rainbowfish species, Tetras, Corydoras catfish, and peaceful Gouramis.

Diet and Feeding:

Boesemani Rainbowfish are omnivorous and enjoy a varied diet. Offer them high-quality flakes, pellets, frozen or live foods like brine shrimp, daphnia, and bloodworms to ensure a balanced and nutritious diet.

Behaviour and Compatibility:

These fish are known for their peaceful and social behaviour within a community aquarium. They exhibit schooling behaviour, so keeping them in groups of at least six individuals is recommended to reduce stress and encourage their vibrant colours to shine.


Breeding Boesemani Rainbowfish in captivity can be a rewarding experience. Provide a separate breeding tank with ample hiding spots and slightly warmer water. Females will lay eggs among plants, and males will fertilise them. Once the eggs hatch, provide small food particles like infusoria for the fry.

In conclusion, the Boesemani Rainbowfish is a captivating and visually striking addition to any freshwater aquarium. Its brilliant colours, peaceful nature, and relatively straightforward care requirements make it an excellent choice for both novice and experienced aquarists. By providing a suitable environment and diet, you can enjoy the beauty and charm of these fish while maintaining their health and vitality.