Checkered Ornate Rainbowfish (Melanotaenia splendida inornata)

Checkered Ornate Rainbowfish — Melanotaenia splendida inornata

Subtle checkering with natural Australian shine

The Checkered Ornate Rainbowfish is a refined and energetic Australian species known for its clean body shape and soft, patterned contrast. A silver to olive-gold base is overlaid with subtle checkered scale edging that creates a textured, crosshatched appearance under bright lighting. Mature males often develop warm yellow, orange, or red tones in the fins, adding flashes of color when displaying.

Native to rivers and lagoons of northern Australia, Melanotaenia splendida inornata thrives in well-oxygenated water with steady movement. Like all rainbowfish, it is built for motion — constantly cruising midwater and intensifying its color when kept in proper schools. During social interactions, males flare their fins and deepen their tones, bringing dynamic energy to the aquarium.

Growing to approximately 4–5 inches, this species delivers movement and natural coloration without overwhelming smaller community systems.

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Aquarium Setup

• Minimum Tank Size: 55 gallons (75+ gallons recommended for larger 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 checkered scale effect)

• Filtration: Strong biological filtration required

• Oxygen: Well-oxygenated water essential

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Tank Mates

Best with peaceful to semi-assertive species:

• Other rainbowfish

• Larger tetras

• Peaceful cichlids

• Corydoras

• Non-aggressive catfish

Avoid aggressive predators and fin-nipping species.

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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

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Diet

Omnivorous:

• High-quality flakes or pellets

• Frozen brine shrimp and bloodworms

• Small insects

• Occasional vegetable matter