Lake Kutubu Rainbow (Melanotaenia lacustris) for Sale in Canada

The Lake Kutubu Rainbow (Melanotaenia lacustris) is one of the most striking freshwater rainbowfish in the aquarium hobby. Native to the crystal-clear waters of Lake Kutubu in Papua New Guinea, this species is celebrated for its brilliant turquoise-blue body, shimmering yellow-green highlights, and bright yellow fins. As males mature, they develop a deeper body profile and even more intense colours, making them an impressive centrepiece for larger planted aquariums.

Peaceful, hardy, and constantly active, the Lake Kutubu Rainbow is ideal for aquarists looking to add vibrant colour and energetic schooling behaviour to a freshwater community aquarium.

Monster Aquarium Canada proudly offers healthy Lake Kutubu Rainbow (Melanotaenia lacustris) with professional live fish shipping throughout Canada.

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Why Choose Lake Kutubu Rainbow?

One of the Most Beautiful Blue Rainbowfish

Lake Kutubu Rainbows are highly prized for their:

Unique Features

Premium Characteristics

• Brilliant turquoise-blue body
• Bright yellow to golden fins
• Metallic green highlights
• Peaceful schooling behaviour
• Hardy freshwater species
• Excellent display fish
• Ideal for planted community aquariums
• Vibrant colours that intensify with age

Their brilliant blue coloration makes them one of the most recognizable rainbowfish species.

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Care Requirements

Aquarium Size

A minimum 55-gallon aquarium is recommended for a school of Lake Kutubu Rainbows.

Recommended aquarium setup:

• Mature biological filtration
• Moderate water movement
• Dense live plants
• Open swimming areas
• Driftwood
• Smooth rocks
• Secure aquarium lid

Long aquariums provide the swimming space these active fish require.

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Water Parameters

• Scientific Name: Melanotaenia lacustris
• Common Name: Lake Kutubu Rainbow
• Adult Size: Approximately 5–6 inches (13–15 cm)
• Temperature: 24–28°C (75–82°F)
• pH: 7.0–8.0
• GH: 8–20 dGH
• KH: 5–15 dKH
• Care Level: Easy
• Temperament: Peaceful
• Diet: Omnivore
• Swimming Level: Middle and upper levels
• Lifespan: Approximately 5–8 years

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Feeding Your Lake Kutubu Rainbow

Lake Kutubu Rainbows thrive on a varied diet rich in protein and plant matter.

Recommended Foods

• Premium rainbowfish pellets
• High-quality tropical flakes
• Frozen bloodworms
• Frozen brine shrimp
• Daphnia
• Spirulina-based foods
• Insect-based foods
• Live foods as occasional treats

A balanced diet helps maximize their stunning blue and yellow colours.

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Ideal Aquarium Setup

A spacious planted aquarium closely resembles their natural habitat.

Recommended Features

• Vallisneria
• Amazon Sword Plants
• Java Fern
• Anubias
• Driftwood
• River stones
• Dark sand or gravel
• Open swimming areas

A combination of lush planting and open water creates the ideal environment for this active schooling species.

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Compatible Tank Mates

Lake Kutubu Rainbows are peaceful and thrive with similarly active community fish.

Suitable companions include:

• Boesemani Rainbowfish
• Red Irian Rainbowfish
• Red Lazer Rainbowfish
• Madagascan Rainbow
• Congo Tetras
• Giant Danios
• Pearl Gouramis
• Corydoras
• Bristlenose Plecos
• Peaceful Loaches

Avoid:

• Aggressive cichlids
• Large predatory fish
• Fin-nipping species
• Extremely timid nano fish

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Behaviour

Lake Kutubu Rainbows are energetic and social fish.

Natural Behaviour

• Prefer schools of six or more
• Constant active swimmers
• Males display brighter colours during courtship
• Peaceful with community fish
• Occupy the middle and upper aquarium levels

Keeping them in larger groups encourages natural schooling behaviour and showcases their vibrant colours.

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Breeding

Lake Kutubu Rainbows are egg scatterers.

Breeding Tips

• Feed adults a varied diet
• Maintain excellent water quality
• Provide spawning mops or fine-leaved plants
• Remove eggs after spawning
• Feed fry infusoria followed by baby brine shrimp

Healthy adults may spawn regularly under ideal conditions.

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Why Buy Lake Kutubu Rainbow from Monster Aquarium Canada?

Premium Healthy Aquarium Fish

Every Lake Kutubu Rainbow is carefully selected for:

• Brilliant natural coloration
• Healthy body condition
• Active schooling behaviour
• Strong genetics
• Premium aquarium quality

Professional Live Fish Shipping Across Canada

Monster Aquarium Canada professionally packages every live fish using trusted shipping methods to help ensure safe arrival throughout Canada.

Canada’s Trusted Aquarium Supplier

Monster Aquarium Canada specializes in premium freshwater fish, rare tropical fish, monster fish, freshwater shrimp, crayfish, aquatic snails, aquarium plants, fish foods, medications, and aquarium supplies for aquarium hobbyists across Canada.

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Frequently Asked Questions

1. Are Lake Kutubu Rainbows suitable for beginners?

Yes. They are hardy, peaceful, and easy to care for, making them suitable for both beginner and experienced aquarists.

2. How large do Lake Kutubu Rainbows grow?

Adults typically reach 5–6 inches (13–15 cm).

3. How many Lake Kutubu Rainbows should I keep?

For the best colours and natural schooling behaviour, keep at least six fish together.

4. Can Lake Kutubu Rainbows live in planted aquariums?

Yes. They thrive in spacious planted aquariums with open swimming areas and stable water conditions.

5. Does Monster Aquarium Canada ship Lake Kutubu Rainbows across Canada?

Yes. Monster Aquarium Canada offers professional live fish shipping throughout Canada, helping ensure your Lake Kutubu Rainbows arrive healthy and ready for their new aquarium.