Forktail Blue-eye Rainbowfish: Fish Species Profile

Species Overview

The Forktail Blue-eye Rainbowfish is a small, vibrant freshwater species prized for its iridescent colors and forked tail. This active schooling fish is ideal for peaceful community tanks and thrives in well-maintained aquariums.

• Common Names: Forktail Blue-eye Rainbowfish, Blue-eye Forktail
• Scientific Name: Pseudomugil furcatus
• Adult Size: Up to 2 inches (5 cm)
• Life Expectancy: 3–5 years

Characteristics

• Family: Pseudomugilidae
• Origin: Papua New Guinea
• Social: Peaceful schooling fish
• Tank Level: Mid to upper water levels
• Minimum Tank Size: 15 gallons
• Diet: Omnivore
• Breeding: Egg layer
• Care Level: Moderate
• pH: 6.0–7.5
• Hardness: 5–15 dGH
• Temperature: 73–81°F (23–27°C)

Origin and Distribution

Forktail Blue-eye Rainbowfish are native to slow-moving streams and rivers of Papua New Guinea. They inhabit areas with lush vegetation and clear, slightly alkaline water, making them well-suited for planted aquariums.

Colors and Markings

The Forktail Blue-eye Rainbowfish is easily recognized by its luminous blue eyes, forked yellow tail, and translucent fins edged with yellow or black. Its shimmering body can appear silver to pale yellow, reflecting light beautifully in a well-lit aquarium.

Tankmates

Forktail Blue-eye Rainbowfish are peaceful and compatible with other small, non-aggressive fish. Suitable tankmates include:

• Neon Tetras
• Ember Tetras
• Celestial Pearl Danios
• Harlequin Rasboras
• Corydoras Catfish

Avoid keeping them with fin-nipping or aggressive species, as their delicate fins may be targeted.

Habitat and Care

To replicate their natural environment:

• Use a fine, dark substrate to enhance their coloration.
• Provide plenty of live plants such as Java Moss, Anubias, and floating plants for shade.
• Add driftwood or rocks to create hiding spots and mimic their natural habitat.
• Ensure good water movement with a gentle filter, as they prefer oxygen-rich water.

Maintain stable water parameters and perform regular water changes to keep them healthy.

Diet and Feeding

Forktail Blue-eye Rainbowfish are omnivorous and benefit from a varied diet. Offer:

• High-quality micro pellets or flakes as a staple.
• Live or frozen foods like daphnia, baby brine shrimp, and bloodworms.
• Occasional vegetable-based foods, such as finely chopped spinach or spirulina-based flakes.

Feed 2–3 times daily in small amounts they can consume within a few minutes.

Gender Differences

Males are more brightly colored and have longer, more elaborate fins compared to females. Females are slightly smaller and have rounder bellies, particularly when ready to spawn.

Breeding

Breeding Forktail Blue-eye Rainbowfish can be rewarding with proper preparation:

• Set up a breeding tank with soft, slightly alkaline water and dense plant cover or spawning mops.
• Condition breeding pairs with live and frozen foods for several weeks.
• Remove eggs or transfer adults after spawning to protect the eggs.

Eggs hatch within 7–10 days, and the fry can be fed infusoria or powdered fry food before transitioning to baby brine shrimp.

Further Research

Consider exploring other small, colorful species that pair well with Forktail Blue-eye Rainbowfish, such as:

• Threadfin Rainbowfish
• Celestial Pearl Danios
• Honey Gouramis

FAQ

How many Forktail Blue-eye Rainbowfish should I keep together?
Keep them in groups of 6 or more, as they are schooling fish that thrive in numbers.

Are Forktail Blue-eye Rainbowfish easy to care for?
While hardy, they require stable water parameters and a well-maintained tank, making them moderately challenging for beginners.

What makes Forktail Blue-eye Rainbowfish special?
Their iridescent colors, active swimming behavior, and striking forked tail make them a visually stunning addition to any aquarium.

This guide provides all the essential information for keeping and enjoying Forktail Blue-eye Rainbowfish in your aquarium.