Skip to main content
Boesemani Rainbowfish© Chunbin / CC BY-SA 4.0

Boesemani Rainbowfish

The Boesemani Rainbowfish is famous for its striking two-tone body — electric blue up front fading into fiery orange toward the tail. Native to Indonesia, its colors deepen as it matures, and a small school swimming together makes for a truly eye-catching display. Peaceful and easygoing, it gets along well with other community fish, though its active swimming habits call for plenty of open space in the tank. It readily accepts both prepared and frozen foods, making feeding straightforward, though its care level is generally considered intermediate. Adults reach about 8–12cm and can live 5–8 years, making this a rewarding long-term companion for your aquarium.

View Boesemani Rainbowfish encyclopedia →
Limited Time Offer

0% commission on your first sales!Register by September 30, 2026 and your first 2 sales are commission-free!

Breeder Wanted!

List on BreederDirect and sell directly to customers nationwide!

Free registrationNo monthly feesCommission on sales only
Register Now for Free

Our 6 Transparency Commitments

All Tropical Fish listings include water quality, temperament, and tank size information from verified Breeder.

  • Origin Disclosed
  • Real Photos
  • Water Quality Disclosed
  • Recommended Tank Size
  • Temperament Disclosed
  • Breed Line Disclosed
Browse all 301 breeds
0 items

Verified breeders wanted for Tropical Fish

Breeders are signing up now ahead of launch. Subscribe to be notified when new listings go live.

Getting alerts is free with a member account. When new listings match your saved search, we'll notify you by email and in-app.

Browse other categories

Verified breeders (preview)

Are you raising tropical fish?

Register as a breeder and connect with buyers directly.

Apply as a breeder

About Boesemani Rainbowfish

Boesemani Rainbowfish: a striking blue-and-orange tropical fish that shines in a school. Peaceful, community-friendly, grows to 8–12cm, lives 5–8 years. Intermediate care level.

7 things to know before welcoming a Boesemani Rainbowfish

  1. 1Best Kept in a School

    Boesemani Rainbowfish truly shine when kept in a group rather than alone. Bringing home several at once lets you enjoy their synchronized swimming and vivid color contrast to the fullest.

  2. 2Give Them Room to Swim

    These fish are active swimmers, so choose a tank with plenty of horizontal swimming space. A cramped tank can stress them out and dull their naturally lively movement.

  3. 3Colors Deepen With Age

    Juveniles start out with fairly muted colors, and the blue-orange contrast becomes more pronounced as they mature. By the time they reach their adult size of 8–12cm, their coloring is at its most vivid.

  4. 4Peaceful, Community-Friendly

    Their calm temperament makes them rarely aggressive toward tankmates, so they mix well with similarly sized tropical fish. Just make sure the tank is roomy enough that swimming space doesn't become an issue.

  5. 5Easy Feeding With Prepared Food

    They readily eat both prepared and frozen foods, so mealtime planning is simple. A balanced flake or pellet diet as a staple, supplemented occasionally with frozen food, works well.

  6. 6Intermediate Care Level

    Boesemani Rainbowfish are somewhat sensitive to water quality changes, which is why they're generally considered suitable for intermediate keepers. It's best to introduce them only after your tank has fully cycled and stabilized.

  7. 7A Long-Term Companion

    With a lifespan of around 5–8 years, they're a relatively long-lived tropical fish. Before bringing them home, make sure you're ready for the long-term space and care commitment.

Frequently asked questions about Boesemani Rainbowfish

Q.Is the Boesemani Rainbowfish regulated under CITES?
A.No, the Boesemani Rainbowfish is not subject to CITES. It isn't listed under any special import/export trade restrictions.
Q.Can it be kept with other fish?
A.Yes, its peaceful temperament makes it suitable for a community tank with similarly sized tropical fish. Since it's an active swimmer, just be sure to provide enough open swimming space.
Q.Is this fish suitable for beginners?
A.It's generally considered an intermediate-level fish. Because it can be somewhat sensitive to water quality changes, it's best introduced only after your tank has fully cycled and stabilized.
Q.How big does it grow?
A.Adults typically reach about 8–12cm. As they grow from juveniles, their blue-and-orange color contrast becomes more pronounced.
Q.What should I feed it?
A.It readily eats both prepared and frozen foods. A balanced flake or pellet diet as a staple, combined with occasional frozen food, works well.

Useful tools for Boesemani Rainbowfish care

💧Aquarium Volume CalculatorCalculate water volume, weight, and heater wattage from tank dimensions🧪Water Quality CheckerFind compatible fish, shrimp, plants & corals based on pH, temperature & hardness🍽️Feeding GuideCheck feeding frequency, portion sizes & supplements by species and growth stage🤝Compatibility CheckerCheck compatibility between two species on a 5-level scale📊Fish Compatibility MatrixCheck fish compatibility at a glance with our matrix chart🔄Nitrogen Cycle GuideAuto-calculate bacteria colonization timeline for new tank cycling🗓️Seasonal Care CalendarMonthly care events and seasonal management tips at a glance🚿Water Change CalculatorAuto-calculate optimal water change frequency and volume by tank size and fish count🐠Stocking CalculatorCalculate max fish capacity for your tank size with overstocking alertsElectricity Cost SimulatorCalculate monthly and annual electricity costs for care equipment with presets🧬Breeding PlannerSelect parent varieties to view breeding schedules and offspring patterns🏞️Tank Layout PlannerGet substrate, plant & hardscape suggestions based on tank size and style🧮Care Cost SimulatorEstimate initial, monthly & annual costs by category, care level and quantity⚖️Species Comparison ToolCompare two species side by side: care difficulty, size, lifespan & temperature🎯Pet Match DiagnosticAnswer 7 questions to find your top 3 perfect pets📋Lifetime Cost SimulatorEstimate lifespan and lifetime costs by species for dogs, cats, reptiles and more🚚Transport Safety CheckerCheck transport safety score and precautions by category, season, method and distance💊Medication Dosage CalculatorCalculate proper medication dosage by body weight and medicine type for fish, reptiles, and small animals⏱️Quarantine & Acclimation TimerManage quarantine periods and acclimation steps with countdown timers. Includes recommended durations by species

Learn more about Boesemani Rainbowfish in the encyclopedia

View Boesemani Rainbowfish encyclopedia entry →

Care difficulty, lifespan, size and diet — all basics covered.

More in this category

Can't find the one you're looking for?

Post your wishes for free and breeders with matching animals will contact you with introductions.