Description
Boesemani Rainbowfish (Melanotaenia boesemani)
📌 Basic Info
Scientific Name: Melanotaenia boesemani
Common Names: Boesemani Rainbowfish, Boeseman’s Rainbow, Blue and Orange Rainbowfish
Family: Melanotaeniidae (Rainbowfishes)
Order: Atheriniformes
Origin: Endemic to Lake Ayamaru and Lake Hain in West Papua, Indonesia (Ayamaru Lakes region)
Size: Up to 4.5 inches (11–12 cm)
Lifespan: 8 – 12 years
Tank Zone: Mid to top dweller
🌊 Water Parameters
TDS: 150 – 300 ppm
pH: 7.0 – 8.0
Temperature: 24 – 28°C (75 – 82°F)
Hardness: 8 – 20 dGH
🐟 Characteristics
Body: Distinctively two-toned body — front half is shimmering blue, rear half bright orange/yellow, separated by a gradual blend; deep-bodied with reflective scales.
Behavior: Peaceful, schooling species; active swimmers that display their colors more vividly in groups.
Swimming Style: Fast and energetic; requires open swimming areas.
Unique Feature: Males show brilliant color contrast and longer dorsal fins; females are more subdued in coloration.
Nature: Hardy and ideal for community aquariums.
🍽️ Food
Type: Omnivorous
Diet: High-quality flakes, micro-pellets, live or frozen foods (brine shrimp, daphnia, bloodworms), and occasional blanched vegetables.
Feeding: 2–3 small meals per day.
Tip: A protein-rich and color-enhancing diet keeps their hues vibrant.
🛠️ Maintenance
Tank Size: Minimum 40 gallons (150 L) for a small school; larger preferred.
Filtration: Strong, efficient filtration with good oxygenation; moderate water flow mimics their natural habitat.
Decor: Open swimming areas with background plants; hardy vegetation like Vallisneria or Java Fern.
Lighting: Moderate to bright to enhance iridescent colors.
Water Change: 25–30% weekly to maintain pristine conditions.
👥 Social Behavior
Minimum Group Size: 6 or more (schooling fish).
Tank Mates: Peaceful, similarly sized fish — other Rainbowfish, Barbs, Rasboras, Corydoras, and peaceful Gouramis.
Avoid: Aggressive or fin-nipping species.
✅ Do’s
Keep in groups of 6 or more for best color display.
Provide open space for swimming.
Maintain stable, clean, and well-oxygenated water.
Feed a varied, nutritious diet.
❌ Don’ts
Don’t keep in cramped or low-oxygen tanks.
Don’t house with aggressive or fin-nipping species.
Don’t neglect regular water changes.
⭐ Quick Tips
The Boesemani Rainbowfish is one of the most colorful and active freshwater fish, known for its stunning gradient of blue and orange hues.
Ideal for medium to large community aquariums, they thrive in groups with strong filtration and open swimming space.
Their peaceful nature, long lifespan, and vibrant coloration make them a true centerpiece fish for aquascaped tanks.
