The Turquoise Rainbowfish (Melanotaenia lacustris) is a stunning freshwater schooling fish known for its iridescent turquoise-blue body and vibrant shifting highlights. Native to Lake Kutubu in Papua New Guinea, this active and peaceful species is a fantastic choice for larger community tanks and planted aquariums. Hardy, colorful, and constantly on the move, Turquoise Rainbowfish bring energy and shimmer to the aquarium. When kept in proper groups, they display their best colors and natural schooling behavior, making them a standout addition to any freshwater setup. Key Features Brilliant Turquoise Color: Iridescent blue-green body with shimmering highlights Active Schooling Fish: Constant movement adds life to the aquarium Peaceful Temperament: Great for larger community tanks Hardy & Adaptable: Suitable for a range of freshwater setups Care Information Scientific Name: Melanotaenia lacustris Common Name: Turquoise Rainbowfish Size: Up to 4–5 inches Care Level: Easy to Moderate Temperament: Peaceful, active schooling fish Tank Size: 40 gallons minimum Temperature: 74–82°F pH: 7.0–8.0 Hardness: Medium to hard Diet: Omnivore (flakes, pellets, live and frozen foods) Tank Mates Turquoise Rainbowfish do best with other peaceful, similarly sized community fish such as larger tetras, rainbowfish, barbs, danios, and peaceful cichlids. Avoid keeping them with overly aggressive species or very small fish that may be stressed by their activity. Schooling Behavior This species should be kept in groups of 6 or more to reduce stress, encourage natural behavior, and bring out their best coloration. A proper school creates a much more impressive display in the aquarium. Aquarium Setup Turquoise Rainbowfish thrive in larger aquariums with open swimming space and areas of plants or decor for structure. While they do not require a planted tank, live plants and a darker background can help enhance their vivid colors. Growth & Color Development With a high-quality varied diet and stable water conditions, Turquoise Rainbowfish grow steadily and develop their full iridescent coloration as they mature. FAQ Are Turquoise Rainbowfish good community fish?Yes, they are peaceful and do well with other similarly sized community species. How many should I keep together?A school of at least 6 is recommended for best health, behavior, and color. Do they need a planted tank?No, but planted aquariums can enhance their color and provide a more natural feel. Are they beginner-friendly?Yes, they are hardy and relatively easy to care for in a properly sized tank. How fast do they grow?With proper care and nutrition, they grow steadily and develop stronger color as adults. Shop with Confidence At Tropical Treasures Wyo, we provide healthy, active fish ready to thrive in your aquarium. Our Turquoise Rainbowfish are carefully selected and packed to ensure a smooth transition into your tank.
