Lake Kurumoi Rainbowfish (Melanotaenia parva)

Lake Kurumoi Rainbowfish — Melanotaenia parva

Compact size. Electric color.

The Lake Kurumoi Rainbowfish is a smaller rainbow species that delivers intense color in a streamlined frame. Males develop vibrant orange-red bodies layered with electric blue striping along the flanks and dorsal region. Under proper lighting, the contrast between the warm base color and cool blue lines becomes dramatic, especially when dominant males flare during display.

Endemic to Lake Kurumoi in West Papua, Melanotaenia parva thrives in clear, well-oxygenated freshwater with stable conditions. Like most rainbowfish, it is built for motion — constantly cruising midwater and intensifying its coloration when kept in proper schools. Despite its smaller size, it carries strong personality and active behavior.

Growing to approximately 3–4 inches, the Lake Kurumoi Rainbowfish is perfect for medium-sized aquariums where vibrant schooling movement is desired without large-scale space requirements.

Aquarium Setup

• Minimum Tank Size: 40–55 gallons (larger preferred for full schools)

• Group Size: 6 or more strongly recommended

• Substrate: Sand or fine gravel

• Flow: Moderate current preferred

• Décor: Open swimming lanes with plants or wood along edges

• Lighting: Moderate to bright (enhances red and blue contrast)

• Filtration: Strong biological filtration required

• Oxygen: Well-oxygenated water essential

Tank Mates

Best with peaceful to semi-assertive species:

• Other rainbowfish

• Larger tetras

• Peaceful dwarf cichlids

• Corydoras

• Non-aggressive catfish

Avoid aggressive predators and fin-nipping species.

Water Parameters

• Temperature: 74–82°F (23–28°C)

• pH: 7.0–8.0

• Hardness: Moderate to moderately hard

• Water Quality: Clean and stable conditions essential

Diet

Omnivorous:

• High-quality flakes or small pellets

• Frozen brine shrimp and bloodworms

• Small insects

• Occasional vegetable matter