Boesemani Rainbowfish

The Boesemani Rainbowfish is a striking freshwater species known for its dramatic two-tone coloration — shimmering blue to purple in the front half and vibrant golden-orange in the back. Active, hardy, and constantly in motion, this eye-catching fish makes a stunning centerpiece for larger community aquariums.

Care Instructions

Temperament: Peaceful, active
Difficulty Level: Easy to Moderate
Adult Size: 3–4 inches
Lifespan: 5–8 years
Tank Size: 55 gallons minimum (they love swimming space!)
Temperature: 75–82°F
pH: 7.0–8.0
Water Hardness: Moderate to hard

✔ Keep in groups of 6 or more
✔ Males display brightest colors in groups
✔ Provide open swimming space
✔ Add plants along sides and background
✔ Moderate to strong filtration preferred

They are energetic swimmers and do best in longer tanks with plenty of room to cruise.

 Food

Boesemani Rainbowfish are omnivores and thrive on variety:

• High-quality flakes or pellets

• Frozen or live brine shrimp

• Bloodworms

• Daphnia

• Occasional vegetable-based foods

A protein-rich diet helps enhance their bold coloration.

Fun Facts

• Males develop the most intense color contrast as they mature.
• Their colors become brighter when competing gently for attention.
• They are native to West Papua, Indonesia.
• They look best in schools — the more, the more dramatic the display.