Boesemani Rainbowfish

The Boesemani Rainbowfish is one of the most spectacular and sought-after rainbowfish species in the aquarium hobby. Native to Lake Ayamaru in West Papua, Indonesia, these fish are famous for their stunning bicolor pattern - the front half of their body is typically silver-blue or purple while the rear half is a brilliant orange or yellow, creating a striking contrast that looks almost painted on. Males develop the most intense coloration, especially when competing for female attention or displaying during courtship. Boesemani Rainbowfish are active swimmers that need plenty of open space and are known for their peaceful, schooling nature. They are relatively large for rainbowfish and require more substantial tank space. When kept in optimal conditions with appropriate tank mates, their colors become almost iridescent, making them one of the most beautiful freshwater fish available.

Care Requirements

Tank Setup

Boesemani Rainbowfish require a spacious aquarium with ample swimming room due to their active nature and eventual size. A 55-gallon tank or larger is recommended to house a proper school. Provide open swimming areas in the center with plants along the back and sides. Use gentle to moderate filtration and ensure excellent water quality. Dark substrate helps their colors stand out.

Water Quality

• Temperature: 75-82°F (24-28°C)
• pH: 7.0-8.0 (alkaline preferred)
• Water Hardness: Moderate to hard, 10-20 dGH
• Ammonia/Nitrite: 0 ppm
• Nitrate: <20 ppm

Feeding

These omnivores accept high-quality flakes, pellets, and frozen or live foods. They benefit from a varied diet including vegetable matter. Supplement with color-enhancing foods to bring out their brilliant orange and blue hues. Feed twice daily with portions they can consume in 2-3 minutes.

Behavior & Compatibility

Boesemani Rainbowfish are peaceful schooling fish that should be kept in groups of 6 or more, preferably with more females than males to reduce aggression. They are excellent community fish when housed with other peaceful species of similar size. Their active swimming and brilliant colors make them a centerpiece for larger community tanks.

Tips for Success

• Keep in schools of 6+ with a 2:1 female-to-male ratio for best color display
• Their colors intensify with age; young fish may appear drab initially
• Excellent water quality is essential for maintaining their vibrant colors
• Provide open swimming space; they will not thrive in cramped or cluttered tanks
• Consider them as dither fish for larger, more timid species
• Regular water changes help maintain the pristine conditions they need for optimal coloration