Boesemani Rainbowfish (Melanotaenia boesemani) – A Stunning and Hardy Aquarium Fish
 
The Boesemani Rainbowfish (Melanotaenia boesemani) is a striking freshwater species known for its vibrant blue-to-orange gradient coloration. Native to the lakes and rivers of West Papua, Indonesia, these peaceful, active fish make excellent additions to community aquariums. Their shimmering scales and dynamic swimming behavior create a lively and colorful display.
 
Tank Setup for Boesemani Rainbowfish
Minimum Tank Size: 150 liters (for a small group)
Substrate: Fine gravel or sand
Decor: Live plants, driftwood, and open swimming areas
Water Parameters:
Temperature: 24°C–28°C
pH Range: 6.5–8.0
Water Hardness: Moderate to hard
Filtration: Strong filtration with moderate water flow to mimic their natural habitat
Lighting: Moderate to bright to enhance their iridescent colors
 
Diet and Feeding
Boesemani Rainbowfish are omnivorous and require a balanced diet for optimal health and coloration:
High-quality flakes and pellets (specifically for rainbowfish)
Live or frozen foods like brine shrimp, daphnia, and bloodworms
Blanched vegetables like zucchini and spinach
A varied diet enhances their vibrant hues and overall well-being
 
Behaviour and Tank Mates
Temperament: Peaceful, active, and social
Schooling Nature: Keep in groups of at least 6 to reduce stress and encourage natural behavior
Ideal Tank Mates:
Tetras (like Rummynose or Cardinal Tetras)
Other Rainbowfish species
Corydoras Catfish
Gouramis
Loaches
Avoid: Slow-moving or long-finned fish (Boesemanis are fast swimmers and may startle them)
 
Breeding Boesemani Rainbowfish
Breeding is relatively easy with the right conditions:
Use a separate breeding tank with soft, slightly acidic water
Condition adults with protein-rich live foods
Males display intense colors during courtship
Eggs are laid on fine-leaved plants or spawning mops
Remove adults after spawning to prevent them from eating eggs
Fry hatch in 7–10 days and should be fed infusoria or finely crushed flakes
 
FAQs
How big do Boesemani Rainbowfish get?
They grow up to 10–12 cm in length.
Are they aggressive?
No, they are peaceful but energetic, so they need tank mates that can match their activity level.
Do they need to be kept in groups?
Yes, they are schooling fish and should be kept in groups of at least 6 for their well-being.
How can I enhance their colors?
Provide a varied diet, clean water, and a spacious tank to help them develop their best coloration.
 
Species Overview
Species: Melanotaenia boesemani
Common Name: Boesemani Rainbowfish
Origin: West Papua, Indonesia
Diet: Omnivore
pH Range: 6.5–8.0
Temperature: 24°C–28°C
Max Size: Up to 12 cm
Tank Size: Minimum 150 liters