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Fish Freshwater Care: medium Peaceful

Kamaka Rainbowfish

Melanotaenia kamaka
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Other names: Kamaka, Lake Kamakawaiar rainbowfish
Group: Rainbowfish · Family: Melanotaeniidae · Origin: New Guinea — Lake Kamakawaiar, Triton Bay area (Indonesia)

A 6–7 cm blue-toned rainbowfish from a small lake in western New Guinea. Its deep-bodied males shine sky blue in the light; a collector's species suited to medium-sized aquariums.

Will it suit my tank?

Last updated October 16, 2026

Temperature
24–28°C
pH
6.8–7.8
Hardness
6–15 dGH
Adult size
7 cm
Minimum tank size
100 liters
Social structure
School
Group
at least 6, ideally 10+
Male–female ratio
Dişi ağırlıklı (1 erkek : 2 dişi)
Swimming zone
Middle
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature24–28°C
pH6.8–7.8
General hardness (GH)6–15 dGH
Recommended range
May escape, needs a lid Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The Kamaka rainbowfish is endemic to the small Lake Kamakawaiar near Triton Bay in western New Guinea. Mature males are deep-bodied, and under light their bodies carry a sheen that shifts from light blue to steel blue. It grows to 6–7 cm and can be kept in smaller aquariums than the large rainbowfish. Because its natural habitat is limited to a single small lake, it is important to maintain the fish in the hobby through captive breeding.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 100 liters and 80 cm of length for a school of 6–10.
  • 25–27°C, around neutral, moderately hard water; stable parameters are important.
  • Plants along the edges, with an open swimming area in the middle; a dark substrate brings out the blue.
  • It may jump; use a lid.
  • Hybridization: It hybridizes easily with other Melanotaenia species; breed the species separately to keep a pure line.

Diet

October 16, 2026 · Suggest an edit

Omnivorous. It feeds on fine flakes and micro granules, frozen brine shrimp, cyclops and daphnia. Feed small amounts 2–3 times a day.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

A peaceful, active schooling fish; males display to each other with spread fins. It may eat baby shrimp.

Good companions: Small and medium-sized tetras, rasboras, corydoras, otocinclus, blue-eye species.

Avoid: Fin-nipping barbs, large and aggressive fish; other Melanotaenia species if you plan to breed.

A short profile for this species

The Kamaka Rainbowfish page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026