Overview
The Forktail Blue-Eye (Pseudomugil furcatus) is a freshwater fish belonging to the family Pseudomugilidae. It thrives at temperatures of 22–28 °C with a pH of 6.5–8.0, and requires a minimum tank volume of 60 litres. Known for its peaceful nano fish; males display elaborately to each other, it is considered a intermediate-level species. Short lifespan means wild-caught fish may already be adults; buy young captive-bred fish when possible. Water changes of 25–30 % weekly, stable parameters, and appropriate tank mates are key to long-term success with this species.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Pseudomugilidae |
| Genus | Pseudomugil |
| Species | Pseudomugil furcatus |
| Water type | freshwater |
| Native range | Australasian |
Natural Habitat
Pseudomugil furcatus originates from Australasian. It inhabits freshwater environments and is adapted to the water conditions found in its native range.
Appearance
Adults reach 4–5 cm in length. The body is freshwater and the species displays characteristic coloration suited to its environment.
Behavior
This species is described as a peaceful nano fish; males display elaborately to each other. It naturally schools and should be kept in groups of 6 or more. Activity level is moderate. Short lifespan means wild-caught fish may already be adults; buy young captive-bred fish when possible.
| Trait | Value |
|---|---|
| Temperament | peaceful nano fish; males display elaborately to each other |
| Schooling | Yes |
| Activity level | moderate |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 22–28°C (72–82°F) | Use a reliable adjustable heater |
| pH | 6.5–8 | Avoid sudden swings |
| Hardness (GH) | 5–20 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <15 ppm | Manage through regular partial water changes |
| Min. tank | 60L (16 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- The brilliant blue eyes are highly reflective and visible from across the tank.
- Males perform elaborate fin-spreading displays; a group of males together creates a constant visual show.
- Native to forests streams in Papua New Guinea, where water is warm and well-oxygenated.
📋 Full Care Guide
Ready to set up a tank for your Forktail Blue-Eye? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read Forktail Blue-Eye Care Guide →Related Species
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.