Turquoise Rainbowfish

Turquoise Rainbowfish (Melanotaenia lacustris)

The Turquoise Rainbowfish is a vibrant freshwater species admired for its shimmering blue-green coloration and active schooling behavior. Native to Lake Kutubu in Papua New Guinea, these fish are peaceful, hardy, and make an excellent addition to community aquariums. Their iridescent colors become more intense with proper care and in well-maintained environments.

Care Level: ✅ Easy

Scientific Name: Melanotaenia lacustris
Temperament: ✅ Peaceful
Maximum Size: ✅ Up to 5 inches (13 cm)
Diet: ✅ Omnivore – high-quality flakes, pellets, frozen and live foods such as brine shrimp and daphnia
Minimum Tank Size: ✅ 30 gallons (114 L)
Water Temperature: ✅ 72–79°F (22–26°C)
pH Range: ✅ 7.0–8.0
Compatibility: ✅ Ideal for peaceful community tanks with other non-aggressive species

Turquoise Rainbowfish thrive in groups of six or more and display their best colors when kept in schools. They prefer aquariums with plenty of swimming space, along with some plants for cover. Regular water changes and a balanced diet help maintain their health and vibrant appearance.

Please Note: These fish are active swimmers and may become stressed if kept in small groups or cramped conditions. Ensure adequate space and companionship for optimal well-being.