Lake Kutubu Rainbowfish (Melanotaenia Lacustris)

Melanotaenia lacustris (Lake Kutubu Rainbowfish)

Melanotaenia lacustris is one of the most iconic Rainbowfish species, celebrated for its breathtaking turquoise-blue coloration and elegant swimming behavior. Native to Lake Kutubu in Papua New Guinea, this species is highly prized by aquarists for its vibrant appearance and peaceful temperament.

As they mature, males develop intense metallic blue hues across the body, often accompanied by a deeper body profile and extended finnage. When kept in groups, their natural schooling behavior and shimmering colors create a spectacular display in planted and community aquariums.

Key Features:

- Stunning turquoise-blue metallic coloration

- Peaceful and active schooling fish

- Excellent centerpiece for Rainbowfish aquariums

- Ideal for planted and community tank setups

- Colors intensify with maturity and proper nutrition

Care Level: Easy

Temperament: Peaceful

Adult Size: Up to 10–12 cm

Diet: Omnivore – accepts quality flakes, pellets, frozen, and live foods

Water Temperature: 24–28°C

pH: 7.0–8.0

With its brilliant blue coloration, active personality, and graceful presence, Melanotaenia lacustris is a premium Rainbowfish that brings exceptional beauty and movement to any freshwater aquarium.