Goyder River Rainbowfish – Melanotaenia trifasciata

The Goyder River Rainbowfish is one of Australia's most spectacular native freshwater fish, admired for its shimmering blue-purple body, striking red markings and beautifully contrasting fins. This colourful variety of the Banded Rainbowfish brings exceptional colour and constant movement to a spacious tropical aquarium.

Originating from the Goyder River system in Arnhem Land, Northern Territory, this distinctive locality form of Melanotaenia trifasciata is particularly sought after for the brilliant colouration displayed by mature males.

Goyder River Rainbowfish are active, peaceful schooling fish that look their best when kept in groups. As they mature, their bodies develop greater depth and their colours become increasingly impressive, particularly when males display to one another.

Goyder River Rainbowfish at a Glance

• Scientific name: Melanotaenia trifasciata
• Common names: Goyder River Rainbowfish, Goyder River Banded Rainbowfish
• Origin: Goyder River system, Arnhem Land, Northern Territory, Australia
• Adult size: Approximately 10–13cm, occasionally larger
• Temperament: Peaceful, active schooling fish
• Temperature: 24–28°C
• pH: Approximately 6.5–8.0
• Water hardness: Soft to moderately hard; stable, well-maintained conditions preferred
• Recommended aquarium: 180–200 litres or larger for an adult group, preferably with at least 120cm swimming length
• Group size: At least 6, preferably 8 or more
• Diet: Omnivore
• Care level: Easy to moderate
• Swimming level: Middle to upper aquarium

Stunning Australian Native Colouration

The Goyder River Rainbowfish is prized for its brilliant metallic colouring. Mature males can develop a rich blue to purple sheen, vibrant reddish-orange stripes and striking red and dark markings through their fins.

Their colours are particularly impressive under suitable aquarium lighting, with the reflective scales changing appearance as the fish swims. Males often intensify their colours and extend their fins when displaying to other Rainbowfish.

Females and juveniles are generally more subdued in colour, with the full adult appearance developing as the fish matures.

Individual fish may vary in colour intensity, body shape and markings.

Aquarium Setup and Care

Goyder River Rainbowfish thrive in spacious, established freshwater aquariums with good filtration, stable water conditions and plenty of open swimming space.

These are active fish that appreciate a longer aquarium rather than a small, tall tank. Provide open areas for swimming alongside aquarium plants, driftwood and natural decorations that offer shelter.

They are well suited to planted aquariums, particularly layouts featuring taller plants around the back and sides with open swimming space through the centre.

Good water movement, effective biological filtration and regular partial water changes help maintain the clean, oxygen-rich conditions these fish appreciate.

A secure aquarium lid is important because Rainbowfish can jump when startled.

Explore our aquariums and fish tanks, live aquarium plants and aquascaping supplies when creating your aquarium.

Temperament and Suitable Tank Mates

Goyder River Rainbowfish are peaceful and social, making them excellent choices for spacious community aquariums containing other active, similarly sized fish.

They should be kept in a group of at least six individuals, with larger groups preferred. Keeping several together encourages natural schooling behaviour and creates an impressive display of colour and movement.

Suitable tank mates may include:

• Other peaceful Rainbowfish of a similar size
• Appropriately sized peaceful tropical community fish
• Compatible Corydoras and other peaceful bottom-dwelling fish
• Other non-aggressive Australian native freshwater fish with similar care requirements

Avoid highly aggressive species, persistent fin-nippers and very small or delicate fish that may be intimidated by the Rainbowfish's active swimming and feeding behaviour.

When keeping different Rainbowfish species or geographic varieties together, be aware that closely related species and populations may hybridise if breeding occurs.

Browse our live freshwater aquarium fish range for more suitable community fish.

Feeding Goyder River Rainbowfish

Goyder River Rainbowfish are omnivores that readily accept a varied aquarium diet.

High-quality tropical flakes or appropriately sized floating and slow-sinking pellets provide a suitable staple. Supplement their diet with frozen or live foods such as brine shrimp, daphnia and bloodworms, along with foods containing suitable plant-based ingredients.

A varied diet helps maintain healthy growth, strong condition and natural colour development.

Feed small portions that can be consumed promptly to avoid unnecessary waste and maintain good water quality.

Frequently Asked Questions

How big do Goyder River Rainbowfish grow?

Goyder River Rainbowfish generally reach approximately 10–13cm as adults, although larger specimens are possible. Mature males develop a noticeably deeper body than females.

How many Goyder River Rainbowfish should I keep?

Keep at least six Goyder River Rainbowfish together, preferably eight or more in a suitably sized aquarium. Groups encourage natural behaviour and provide a more impressive display.

Are Goyder River Rainbowfish peaceful?

Yes. They are generally peaceful community fish, although males may display and chase one another. Provide adequate swimming space and maintain a suitable group size.

Are Goyder River Rainbowfish Australian natives?

Yes. The Goyder River Rainbowfish is a geographic variety of Melanotaenia trifasciata originating from the Goyder River system in Arnhem Land, Northern Territory.

When do Goyder River Rainbowfish develop their colours?

Juvenile fish are usually less colourful than mature adults. Males develop increasingly strong blue-purple and red colouration as they grow, with intensity influenced by age, diet, lighting and general condition.

Can Goyder River Rainbowfish live in planted aquariums?

Yes. They thrive in planted aquariums with plenty of open swimming space. Tall plants, driftwood and natural decorations provide shelter while allowing the fish to display their active swimming behaviour.

What do Goyder River Rainbowfish eat?

They accept quality tropical flakes, appropriately sized pellets and a variety of frozen or live foods such as brine shrimp and daphnia. A balanced, varied diet helps maintain condition and colour.

Buy Goyder River Rainbowfish Online in Australia

Bring the incredible colours of Australian native freshwater fish to your aquarium with the Goyder River Rainbowfish from Aquaholics Online.

Based on the Sunshine Coast, Queensland, Aquaholics Online supplies freshwater aquarium fish, plants and aquarium accessories to fishkeepers throughout Australia, with live fish shipping available to eligible locations.

Our Arrive Alive Guarantee

We take every reasonable precaution to ensure your fish arrive safely.

If a fish arrives deceased, please contact us within 2 hours of delivery with your order details and clear photos of the affected fish.

Once your claim has been verified, an applicable refund or store credit will be provided in accordance with our Arrive Alive Guarantee and your rights under Australian Consumer Law.

Explore our full range of live aquarium fish and discover more colourful freshwater aquarium species.