Overview
The Pristella maxillaris, also known as the X-Ray Tetra, is a popular freshwater fish known for its unique appearance and peaceful nature. They are slender and iridescent, with a clear, almost x-ray-like body. They are best kept in groups of 6 or more and thrive in well-planted tanks with a moderate water flow. Their peaceful temperament makes them ideal for community tanks, though they can be shy in smaller spaces. These tetras are relatively easy to care for, making them a great choice for beginners.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Characidae |
| Genus | Pristella |
| Species | Pristella maxillaris |
| Water type | freshwater |
Natural Habitat
Native to the warm, flowing waters of South America, Pristella maxillaris are often found in the rivers of Brazil and Peru.
Appearance
Characterized by their clear, x-ray-like bodies, these tetras display vibrant blue and white colors, especially in well-lit conditions.
Behavior
Pristella maxillaris are generally non-aggressive and do well in groups, though they may be shy and prefer the company of other fish. They are not known to be overly active and are best kept in a calm environment.
| Trait | Value |
|---|---|
| Temperament | peaceful community fish |
| Schooling | No |
| Activity level | moderate |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 22–28°C (72–82°F) | Use a reliable adjustable heater |
| pH | 6–7 | Avoid sudden swings |
| Hardness (GH) | 5-15 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <20 ppm | Manage through regular partial water changes |
| Min. tank | 20L (5 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- They can change color depending on their mood or environmental conditions.
- The Pristella maxillaris is often confused with the closely related Cardinal Tetra.
- They are known to be very hardy and adaptable to various water conditions.
📋 Full Care Guide
Ready to set up a tank for your X-Ray Tetra? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read X-Ray Tetra 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.