Lake Kutubu Rainbowfish
Melanotaenia lacustris
Also known as: Lake Kutubu Rainbowfish, Turquoise Rainbowfish
Origin: Papua New Guinea (Lake Kutubu)
Water Parameters
Quick Stats
- Max Size
- 12 cm
- Min Tank
- 200 L
- Lifespan
- 5-8
- Swimming Level
- middle
- Schooling
- Yes (6–12+)
- Diet
- omnivore
- Temperament
- peaceful, active schooling fish
About
Endemic to Lake Kutubu in the Southern Highlands of Papua New Guinea, Melanotaenia lacustris inhabits clear, alkaline, hard water rich in dissolved minerals. Males display brilliant turquoise-blue colouration with yellow-green undertones, intensifying during spawning. A hardy and adaptable species once established, ideal for the dedicated rainbowfish community aquarium.
Care Guide
Water: 23–27°C, pH 7.5–8.5, hard water (GH 12–20, KH 6–12). Tank: 200 L+, open swimming lanes, robust or hardy plants. Feeding: Omnivore; flakes, pellets, and regular frozen/live foods. Behaviour: Peaceful, active schooling fish; males display to each other constantly. Compatibility: Excellent with other rainbowfish and similarly sized peaceful species.
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