The Boesemani Rainbowfish (Melanotaenia boesemani) is a stunning freshwater fish known for its unique two-tone coloration—deep blue in the front half of its body and bright yellow or orange in the back half. This species is highly popular in the aquarium trade due to its vibrant colors and peaceful nature.
Key Information:
• Maximum Size: Up to 4.5–5 inches (11–13 cm) in length.
• Native Habitat: Found in lakes and rivers of West Papua, Indonesia, particularly Lakes Ayamaru, Hain, and Aitinjo.
• Growth Rate: They grow relatively quickly, reaching around 3 inches (7–8 cm) in their first year under ideal conditions.
• Life Span: Typically 5–8 years, but can live longer with excellent care.
• Diet: Omnivorous – They consume a variety of foods, including small insects, crustaceans, algae, high-quality flakes, pellets, and live or frozen foods such as bloodworms and brine shrimp.
• Breeding Season: In the wild, they breed during the rainy season, but in captivity, they can spawn year-round with the right conditions, such as soft plants, slightly warmer water, and a high-protein diet. They are egg scatterers, meaning they lay eggs among vegetation.
• Best Tank Mates:
• Other Rainbowfish species (e.g., Red Rainbowfish, Neon Rainbowfish)
• Larger Tetras (Congo Tetras, Rummy Nose Tetras)
• Barbs (Denison Barbs, Cherry Barbs)
• Gouramis
• Corydoras Catfish
• Plecos
• Avoid slow-moving or fin-nipping fish.
Additional Care Tips:
• Best kept in schools of at least 6 to encourage natural behavior and reduce stress.
• Require a minimum tank size of 55 gallons, as they are active swimmers.
• Prefer water temperatures between 75–82°F (24–28°C) with a pH of 6.5–8.0.
• A well-planted aquarium with open swimming space mimics their natural environment.
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