Blyth River Banded Rainbowfish (Melanotaenia trifasciata)
The Blyth River Banded Rainbowfish is a beautiful Australian rainbowfish locality form of Melanotaenia trifasciata, prized for its deep body, strong mid-lateral band and mature male colouration that can develop rich red, orange, gold and darker flank tones. This Blyth River form comes from northern Australia and is closely related in appearance to some of the better-known Goyder River-type banded rainbowfish, but it remains a highly desirable locality strain in its own right. In the aquarium it is an active, social and eye-catching mid-to-upper water swimmer that looks best in a spacious planted aquarium with clean, well-oxygenated water.
Key Features
- Native to northern Australia
- Strong mid-lateral band and vibrant colouration in mature males
- Active and social behaviour in community tanks
- Best suited to spacious planted aquariums with good water flow
| Feature | Detail |
|---|---|
| Species | Melanotaenia trifasciata |
| Common Name | Blyth River Banded Rainbowfish |
| Origin | Northern Australia |
| Water Temperature | 22–26°C |
| Water pH | 6.0–7.5 |
| Hardness | 2–12 dGH |
| Adult Size | 5–7 cm |
FAQ
What makes the Blyth River Banded Rainbowfish different from other rainbowfish varieties?
The Blyth River Banded Rainbowfish has a distinct deep body and a strong mid-lateral band. Mature males develop rich red, orange, gold, and darker flank tones, setting it apart from other forms like the Goyder River type. It is a highly sought-after locality strain due to its unique colouration and active behaviour.
What kind of aquarium setup is best for this fish?
This fish thrives in a spacious planted aquarium with clean, well-oxygenated water. It is an active mid-to-upper water swimmer and benefits from good water flow and ample open space to swim.
How long does it take for male Blyth River Rainbowfish to develop full colouration?
Full colouration typically develops after several months in a stable environment, especially when the fish reaches maturity. Proper water conditions and a balanced diet support vibrant pigmentation.
Piers Oliver –
The Blyth River Banded Rainbowfish is stunning in a well-planted tank. The males develop beautiful red and gold tones over time. They are active and peaceful with other community fish. I keep them in a 60-liter tank with live plants and good water flow. They look great and are easy to care for.
Colin Roberts –
I bought this fish for my beginner aquarium. The colouration is impressive, especially when the males mature. They swim actively and don’t stress easily. I recommend a spacious tank with good oxygenation. Not the most aggressive, but they do need some space to thrive.
Blake Cameron –
This is one of the most visually appealing rainbowfish I’ve kept. The banding and colour shift are subtle but striking. I’ve had them for over six months and they remain healthy and active. The tank setup is simple but effective with floating plants and a filter.