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Fish

Boeseman's rainbowfish

Melanotaenia boesemani
French name : Arc-en-ciel de Boeseman

Boeseman's rainbowfish is a colorful member of the family Melanotaeniidae, native to the Ajamaru Lakes region of the Vogelkop Peninsula in West Papua, Indonesia. Mature males show a striking two-tone body, bluish-gray at the front grading into orange-red at the rear, while females are more silvery. It is an active, peaceful shoaling fish that should be kept in groups; males display their best colors when competing for the attention of females. Its constant swimming makes it a lively midwater and upper-tank occupant. It thrives in a spacious, well-planted aquarium with open swimming areas, neutral to slightly alkaline water, and good current. It accepts a wide range of foods and colors up best on a varied diet. Egg-scattering breeding occurs among fine-leaved plants or spawning mops, with eggs hatching over one to two weeks.

Water
Freshwater
Origin
Ajamaru Lakes, West Papua, Indonesia
Adult size
10 cm
Diet
Omnivore
Temperament
Peaceful
Difficulty
Beginner
Keep in group of
6+
Boeseman's rainbowfish (Melanotaenia boesemani)
Illustration

Water parameters

Temperature25 – 30 °C
pH7 – 8
Carbonate hardness (KH)5 – 15 °dKH
General hardness (GH)8 – 20 °dGH

Tank & stocking

Minimum tank volume200 L
Volume budget per individual 20 L — adds up with tank-mates
Minimum group size6 individuals (shoaling)

“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.

Frequently asked questions

What size aquarium does Boeseman's rainbowfish need?

Provide at least 200 litres for a small group to keep Boeseman's rainbowfish in good conditions.

What water parameters does Boeseman's rainbowfish need?

A temperature of 25–30 °C, pH 7–8.

Is Boeseman's rainbowfish peaceful or aggressive?

Its temperament is peaceful.

What does Boeseman's rainbowfish eat?

Its diet: omnivore.

How many Boeseman's rainbowfish should be kept together?

It is a social species: keep a group of at least 6.

How big does Boeseman's rainbowfish get?

Around 10 cm as an adult.

Is Boeseman's rainbowfish suitable for beginners?

Care level: beginner.

Planning a tank with Boeseman's rainbowfish?

AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.

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Fish from the same biotope

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