Forktail Rainbowfish (Pseudomugil furcatus)
The Forktail Rainbowfish (Pseudomugil furcatus) is a true showstopper among aquarium fish. Males display striking lemon-yellow dorsal, caudal, and anal fins, accented with black trim and a dramatic, deeply forked tail. Both sexes boast brilliant blue eyes, lending the species its popular nickname.
Forktail Rainbowfish are prized for their small adult size and unique, rarely exceeding 2 inches (5 cm), fluttering swimming style. When kept in groups, males intensify their fin displays and colors in lively courtship rituals. Their slender, translucent bodies and yellow-black forked tails are especially eye-catching under aquarium lighting, adding shimmer to any community tank.
| Specification | Detail |
|---|---|
| Scientific Name | Pseudomugil furcatus |
| Adult Size | Up to 2 inches (5 cm) |
| Coloration | Lemon-yellow fins with black trim, blue eyes |
| Behavior | Active, social, displays in groups |
| Water Temperature | 72–78°F (22–26°C) |
FAQ
What makes the Forktail Rainbowfish stand out in an aquarium?
The Forktail Rainbowfish is distinguished by its vibrant lemon-yellow fins with black trim and a deeply forked tail. Both males and females have brilliant blue eyes, creating a striking visual effect under aquarium lighting.
How big do Forktail Rainbowfish grow?
Forktail Rainbowfish rarely exceed 2 inches (5 cm) in adult size.
Are they suitable for community tanks?
Yes, they are well-suited for community tanks when kept in groups. Their active and social behavior makes them a lively addition to a balanced aquarium.
David Walsh –
The Forktail Rainbowfish are a stunning addition to my tank. The males show off their bright yellow fins and blue eyes, especially when swimming in groups. They’re active but not aggressive, and the forked tail is very eye-catching under regular lighting.
Frank Mills –
I’ve had these fish for three months now and they’ve become a highlight of my aquarium. The coloration is vivid and they swim gracefully. I keep them in a 20-gallon tank with other peaceful species and they coexist well.
Alexander Oliver –
The blue eyes and yellow fins are simply beautiful. They don’t require much space and are easy to care for. The courtship displays when the males are grouped are fascinating to watch.