Irian jaya rainbowfish - Melanotaenia irianjaya

Scientific name: Melanotaenia irianjaya

Common name: Irian jaya rainbowfish

Family: Melanotaeniidae

Usual size in fish tanks: 8 - 10 cm (3.15 - 3.94 inch)

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Recommended pH range for the species: 6.3 - 7.1

Recommended water hardness (dGH): 6 - 16°N (107.14 - 285.71ppm)

0°C 32°F30°C 86°F

Recommended temperature: 23 - 27 °C (73.4 - 80.6°F)

The way how these fish reproduce: Spawning

Where the species comes from: South Asia

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Bottom levels

Food and feeding

Irian Jaya Rainbowfish thrive on a varied diet that includes high-quality flake foods and floating pellets as the staple. To maintain their vibrant colors and overall health, supplement their diet with live or frozen foods such as bloodworms, white worms, and brine shrimp at least twice a week. Including these protein-rich foods ensures they get the nutrients necessary for energy and growth. Additionally, offering occasional vegetable matter like spirulina flakes can provide a balanced diet.

Origin

The Irian Jaya Rainbowfish is native to Asia, specifically to Lake Sentani in the Papua province of Indonesia. This lake is known for its clear, freshwater environment, and the fish have adapted to its slightly alkaline, warm waters. The natural habitat includes densely vegetated areas and open spaces, mimicking the conditions found in their native range is essential for maintaining their health and natural behavior in captivity.

Sexing

Sexing Irian Jaya Rainbowfish is relatively easy, especially when they reach adulthood. Males are more colorful, exhibiting a striking reddish body coloration with reddish fins, particularly during breeding. Females, on the other hand, have a more subdued appearance with clear fins and a yellowish-brown body coloration. The males also tend to be slightly larger and more elongated than the females, making it easier to distinguish between the two sexes in a well-lit aquarium.

Breeding

Breeding Irian Jaya Rainbowfish can be a rewarding experience for aquarists. To create the best breeding environment, set up a separate tank with plenty of Java moss or fine-leaved plants, which provide excellent spawning sites. Gradually raise the temperature by a few degrees to encourage spawning. The process typically lasts several weeks, during which the female will lay a few eggs each day. After spawning, it's important to remove the adults, as they may eat the eggs. The eggs will hatch in about 7 to 10 days, depending on the water temperature. The fry should be fed on Infusoria or liquid fry food until they are large enough to eat newly hatched brine shrimp or crushed flake food.

Lifespan

The Irian Jaya Rainbowfish can live for up to 7 years in optimal conditions. Providing clean water, a balanced diet, and proper tank mates will help them reach their full lifespan. Regular maintenance and monitoring water quality are key factors in ensuring a healthy life for these fish.

Short description

Irian Jaya Rainbowfish are active, peaceful fish that thrive in community tanks with other non-aggressive species. They require plenty of open swimming areas at the front of the aquarium, while the rear should be densely planted to mimic their natural habitat. It's essential to provide a tight-fitting lid, as these fish are known for their jumping abilities, especially when startled. Their brilliant colors and dynamic swimming behavior make them a popular choice for aquarists looking to add both beauty and activity to their tank.