Maccullochi Dwarf Rainbow L – Melanotaenia maccullochi

Maccullochi Dwarf Rainbow L, scientifically known as Melanotaenia maccullochi, is a graceful dwarf rainbowfish appreciated for its soft iridescent hues, streamlined body, and calm temperament. Compared to more vividly colored rainbowfish, this species offers a more natural and understated beauty, with subtle blends of silver, blue, and yellow tones that shimmer under good lighting.

Originating from northern Australia, this species thrives in clean, well-oxygenated waters and is well-suited for planted aquariums that mimic its natural habitat. The “L” size indicates larger, well-developed individuals, typically showing fuller bodies and more pronounced coloration.

Maccullochi Rainbowfish are active swimmers and schooling fish, often seen cruising in the mid to upper levels of the tank. Their peaceful nature and moderate activity make them an excellent choice for community aquariums with other non-aggressive species.

Key Features

• Species: Melanotaenia maccullochi

• Subtle iridescent silver-blue-yellow coloration

• Dwarf rainbowfish with elegant body shape

• “L” size – larger, mature specimens

• Peaceful and schooling species

• Ideal for planted community tanks

Size

• Adult size: 6 – 8 cm

• “L” specimens are typically 5 – 7 cm

• Slender, laterally compressed body

Temperament

Maccullochi Dwarf Rainbow L is peaceful and social.

• Best kept in groups of 6 or more

• Active mid to upper water swimmer

• Minimal aggression

• Males may display mild sparring behavior

Water Conditions

Prefers stable, clean freshwater conditions.

• Temperature: 22 – 26°C (72 – 79°F)

• pH: 6.5 – 7.5

• GH: 5 – 15 dGH

• Ammonia/Nitrite: 0 ppm

• Nitrate: < 20 ppm

Perform regular weekly water changes (20–30%).

Tank Setup

Best kept in a well-structured planted aquarium.

Recommended setup includes:

• Live plants for cover and aesthetics

• Open swimming areas

• Driftwood and natural décor

• Moderate lighting (enhances subtle colors)

• Gentle to moderate flow

Minimum tank size: 80 liters (~20 gallons).

Feeding Habits

Omnivorous with a preference for varied diet.

Diet can include:

• High-quality flakes or micro pellets

• Frozen foods (brine shrimp, daphnia)

• Live foods to enhance color and activity

• Occasional vegetable-based foods

Feed 1–2 times daily.

Tank Mates

Suitable for peaceful community aquariums.

Suitable tank mates:

• Tetras

• Rasboras

• Corydoras

• Small gouramis

• Other peaceful rainbowfish

Tank mates to avoid:

• Aggressive fish

• Fin-nippers

• Very slow or delicate species

Care and Maintenance

To keep them healthy:

• Maintain clean, well-oxygenated water

• Keep in groups for natural schooling behavior

• Provide balanced diet

• Ensure stable water parameters

• Perform regular water changes

With proper care, they can live 4–6 years.

Why Choose Maccullochi Dwarf Rainbow L?

• Elegant, subtle natural coloration

• Peaceful and community-friendly

• Active but not overly aggressive

• Suitable for planted aquariums

• Great schooling behavior

Maccullochi Dwarf Rainbow L is a refined and understated fish that brings gentle color, smooth movement, and harmony to an aquarium. Its calm nature and schooling behavior make it a perfect addition for balanced community setups. 🐟🌿✨