The Pristella Tetra, also known as the X-ray Tetra, is a small, peaceful schooling fish native to South America. Its unique transparent appearance, combined with its ease of care, make it a popular choice for beginner and experienced aquarists alike. Pristella Tetras are a stunning addition to a community tank or a biotope setup, and their social nature makes them ideal for groups of at least 6 or more.

Pristella Tetras have a translucent body with a hint of silver, which gives them the appearance of an X-ray, hence their other common name. Though the body is near see-through, the most striking features of this tetra are the black and yellow bands on their dorsal and anal fins, which contrast beautifully against their grey bodies. These fish typically reach a maximum length of 5 cm, making them suitable for smaller tanks as well.