Jantan Boesemani Rainbow Fish Melanotaenia Boesemani 5cm

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Overview:
The Jantan Boesemani Rainbowfish ("Jantan" meaning "male" in Indonesian/Malay) is a vibrantly colored freshwater fish, prized for its brilliant split coloration—a glowing blue front half fading into a fiery orange or yellow back. Males exhibit the most intense colors, especially when kept in groups or during courtship. Active, peaceful, and hardy, Boesemani Rainbows are a favorite centerpiece in planted and community aquariums.

Origin:
Endemic to Lake Ayamaru and Lake Hain in the Bird's Head Peninsula of West Papua (Indonesia). In the wild, they thrive in clear, alkaline freshwater lakes with dense vegetation.

Feeding:
Omnivorous and enthusiastic eaters. Feed a varied diet of high-quality flake or micro pellets, frozen or live brine shrimp, daphnia, and bloodworms. Supplement with vegetable-based flakes or spirulina to maintain vibrant color.

Tank Mates:
Peaceful and best kept in schools of 6 or more, which enhances color and reduces stress. Ideal tank mates include other rainbowfish, danios, rasboras, Corydoras, and peaceful livebearers. Avoid slow or long-finned fish that may be outcompeted for food.

Water Parameters:

• Temperature: 75–82°F (24–28°C)

• pH: 7.0–8.0

• Moderately hard water

• Minimum Tank Size: 40 gallons (larger is better for schools)

• Prefers open swimming areas with planted edges

Behavior & Personality:

• Active mid-to-top level swimmer

• Males are more colorful and slightly larger than females

• Social, schooling, and very interactive in groups

Special Notes:

• Coloration intensifies with age, good diet, and clean water

• Performs best in well-maintained, oxygen-rich tanks

• Regular water changes and a stable environment are key

• Excellent for aquascaped or biotope-style community tanks

The Jantan Boesemani Rainbowfish is a true showstopper, offering energy, vivid color, and peaceful schooling behavior in one beautifully compact package. Perfect for hobbyists looking to elevate their tank with one of the most iconic rainbowfish species in the hobby.

Above images for illustration purposes only. Exact colours, patterns, and size may vary between individuals.

Please Note: The livestock that is sold on our online site is not held in store at our Swell shop, or available for collection from the shop. Species sold at our Swell store will differ from ones available to order to your door.

All livestock deliveries are subject to our full Delivery Terms & Conditions, please read before ordering.