X-Ray Tetra Care Guide
Pristella maxillaris · Freshwater Fish
What X-Ray Tetra look like
Pristella maxillaris, commonly known as the X-Ray Tetra, exhibits a distinctive semi-transparent body that allows for the faint visibility of its vertebral column and swim bladder, contributing to its namesake. This species typically reaches a maximum adult size of approximately 1.5 to 2 inches (3.8 to 5.1 cm). Sexual dimorphism is subtle; males tend to display slightly more vibrant coloration and a more streamlined body compared to the relatively fuller-bodied females. The fins are particularly notable, with the dorsal and anal fins showcasing striking yellow, black, and white banding, while the caudal fin exhibits a pinkish-red hue. The presence of a lateral line is evident, aiding in the detection of water movement, and the overall body shape is fusiform, facilitating agile swimming. Defensive adaptations include schooling behavior, which provides safety in numbers, and the ability to quickly dart away from potential predators.
Behavior & temperament
X-Ray Tetras are social fish that thrive in groups, exhibiting a strong tendency to form schools, which enhances their safety and reduces stress. They typically inhabit the mid to upper levels of the water column, displaying active swimming behavior. Breeding occurs through egg scattering, where females release eggs into the water column, allowing for external fertilization. Their temperament is generally peaceful, making them suitable for community tanks; however, they can exhibit mild territoriality during breeding periods. In their natural habitat, they are often found in slow-moving waters with ample vegetation, which provides cover and foraging opportunities.
Diet & feeding
In the wild, X-Ray Tetras are omnivorous, feeding on a varied diet that includes small invertebrates, plant matter, and detritus. In captivity, they thrive on a balanced diet of high-quality flake food, supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health and coloration.
Behind the name
Pristella (from Latin, meaning 'delicate' or 'fragile'); maxillaris (from Latin, meaning 'of the jaw', referring to the fish's mouth structure).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping X-Ray Tetra?
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