X-Ray Tetra

The X-Ray Tetra (Pristella maxillaris) is a captivating freshwater fish admired for its translucent body and elegant fin markings. Known for its almost transparent appearance, this species reveals subtle internal structures when illuminated properly, creating a unique “x-ray” effect that gives it its common name. Its dorsal and anal fins display striking bands of black, yellow, and white, while the tail often carries a warm orange to reddish hue, making it stand out beautifully in a well-designed aquascape.

Native to coastal river systems in South America, particularly in Venezuela, Guyana, and Brazil, the X-Ray Tetra thrives in calm, slow-moving waters rich in vegetation. In the aquarium, it adapts exceptionally well to planted tanks that replicate its natural habitat. A lush aquascape with fine-leaved plants, mosses, driftwood, and a soft, natural substrate enhances both its coloration and behavior. Gentle, diffused lighting works best to highlight the fish’s semi-transparent body without washing out its delicate tones.

Growing to about 4–5 cm (1.5–2 inches), the X-Ray Tetra is a peaceful schooling fish that should be kept in groups of at least six individuals, though larger schools create a far more dynamic and natural display. When kept in proper numbers, they exhibit synchronized swimming patterns that add movement and harmony to aquascaped aquariums. Their calm temperament makes them compatible with other small, non-aggressive species such as rasboras, dwarf cichlids, Corydoras catfish, and other tetra varieties.

Water parameters are relatively flexible, which contributes to their popularity among beginners and experienced aquarists alike. They prefer temperatures between 22–28°C (72–82°F), with slightly acidic to neutral pH levels. Stable water conditions, regular maintenance, and high-quality filtration will ensure their long-term health and vibrant appearance. Because of their hardy nature, X-Ray Tetras are often recommended as an ideal choice for community tanks and nature-style aquascapes.

Diet-wise, they are omnivorous and readily accept high-quality flakes, micro pellets, and frozen or live foods such as daphnia and brine shrimp. A varied diet enhances their coloration and supports optimal health. In a balanced aquascape environment, their shimmering bodies reflect subtle greens from surrounding plants, creating a visually stunning contrast against rich aquatic backgrounds.

The X-Ray Tetra is not only visually distinctive but also highly versatile in aquascaping compositions. Its translucent body adds depth and layering to planted layouts, especially in tanks designed with perspective and scale in mind. Whether featured as the focal point in a close-up composition or swimming midwater in a larger planted aquarium, Pristella maxillaris delivers elegance, movement, and natural beauty to any freshwater setup.