Forktail Rainbow

Forktail Rainbowfish (Pseudomugil furcatus)

The Forktail Rainbowfish is a graceful and energetic nano fish, admired for its brilliant blue eyes, vibrant yellow fins, and distinctive forked tail. Native to the clear streams and freshwater creeks of Papua New Guinea, this beautiful rainbowfish is prized for its peaceful temperament, constant activity, and eye-catching display behavior. Its striking coloration and elegant swimming style make it a standout addition to planted and community aquariums.

Forktail Rainbowfish are active, social fish that thrive in schools, spending much of their time swimming throughout the middle and upper levels of the aquarium. Males display brighter colors and extended fins, frequently engaging in harmless courtship displays and sparring with one another to impress females. Their peaceful disposition makes them excellent companions for other small, non-aggressive fish, and they are constantly on the move, bringing life and energy to the aquarium.

These hardy rainbowfish thrive in well-planted aquariums with gentle water movement, open swimming space, and areas of dense vegetation for shelter. Floating plants and subdued lighting help enhance their natural colors while providing a sense of security. Stable water conditions and excellent water quality are important for maintaining their health and encouraging natural behaviors. A varied diet of high-quality micro pellets, crushed flakes, frozen baby brine shrimp, daphnia, and occasional live foods will keep them in peak condition and promote their vibrant coloration.

Quick Facts:

• Care Level: Easy
• Temperament: Peaceful
• Adult Size: 2–2.5 inches (5–6 cm)
• Minimum Tank Size: 20 gallons
• Temperature: 74–82°F (23–28°C)
• pH: 6.5–7.5
• Diet: Omnivore
• Schooling: Yes, best kept in groups of 8 or more

With their brilliant blue eyes, vibrant yellow fins, and lively schooling behavior, Forktail Rainbowfish are an outstanding choice for aquarists seeking a peaceful, active species that adds elegance, movement, and flashes of color to planted and community freshwater aquariums.