Threadfin Rainbowfish

To protect our animals and to ensure they get to our customers healthy, we will only ship orders with Nano Fish via UPS Next Day Air.

The Threadfin Rainbowfish (Iriatherina werneri) is a small, peaceful, and visually stunning freshwater fish prized by aquarists for its unique, delicate finnage and lively, dancing movements. Native to slow-moving waters in northern Australia and New Guinea, these fish are an excellent addition to a well-established community tank.

 The Threadfin Rainbowfish gets its name from the males' exceptionally long, thread-like dorsal and anal fins. Their bodies are typically a light, translucent color with hints of yellow, blue, and green. Males are the most vibrant, displaying their incredible finnage and color to attract females. Females have a similar body color but lack the elongated fins.

Threadfin Rainbowfish are pretty easy to care as long as they are introduced to a mature, cycled tank. They can acclimate to a wide range of parameters.  The following are our water parameters we keep them at:

Our Tank Water Parameters

PH: 7.2 to 7.5
GH: 7 to 8
KH: 3 to 4
TDS: 180 to 250
Temp: 75F to 80F

We feed them a mix of live baby brine shrimp, frozen daphnia and high-quality flake food.