About Forktail Rainbowfish
The Forktail Rainbowfish is a stunning small rainbowfish named for the distinctive forked shape of its tail fin. Males display brilliant yellow bodies with bright blue eyes and iridescent blue highlights on their fins, which they flash constantly while displaying to females. Native to Papua New Guinea, these active fish are always on the move, exploring every level of the tank. Their unique tail shape and non-stop activity make them a fascinating addition to community tanks.
Care Guide
Care Requirements
Tank Setup
Forktails are very active and appreciate open swimming space with some plant cover. They use all levels of the tank.
Essential Setup:
- Heater maintaining 78-80°F
- Gentle to moderate filtration
- Open swimming space essential
- Some floating plants (appreciate cover)
- Moderate lighting
- Dark substrate enhances colors
Water Quality
- Temperature: 75-82°F (24-28°C)
- pH: 6.5-8.0 (wide range acceptable)
- Water Hardness: Moderate (5-20 dGH)
- Ammonia/Nitrite: 0 ppm
- Nitrate: <20 ppm
Very adaptable to water parameters.
Feeding
Omnivores with small mouths:
- Small flake foods
- Micro pellets
- Frozen or live baby brine shrimp
- Daphnia
- Cyclops
Feeding Schedule: Small amounts 3 times daily (active metabolism).
Behavior & Compatibility
Constantly active, peaceful fish suitable for:
- Peaceful community tanks
- Upper level swimmers
- Similar sized fish
Avoid:
- Large predators
- Fin-nippers
- Aggressive fish
Schooling Behavior
Keep in groups of 6-8 minimum. They school loosely and males constantly display their fins to attract females.
Sexual Dimorphism
Males: Yellow body, bright blue eyes, elongated forked fins, iridescent blue highlights on fins Females: Duller, fins not forked, less yellow
Tips for Success
- Keep in groups with multiple males for display
- Very active—need swimming space
- Appreciate floating plants
- Feed small amounts frequently
- Unique tail shape makes them special