Prionobrama filigera, commonly known as the Glass Bloodfin Tetra, is a captivating and popular species of freshwater fish native to the Amazon River basin in South America. This species is part of the Characidae family, which is known for its diverse and colorful members that are often favorites among aquarium enthusiasts. The Glass Bloodfin Tetra is particularly admired for its translucent body, through which one can see its internal organs, and the vibrant red coloration of its fins, especially the caudal (tail) fin, which gives the fish its common name.

The Glass Bloodfin Tetra is a relatively small and peaceful fish, making it an excellent addition to community aquariums housing other similarly sized and non-aggressive species. Their schooling nature adds a dynamic and visually striking element to the tank, as the group moves together through the water, with the red fins creating a vivid contrast against both their transparent bodies and the green backdrop of a planted aquarium.

Creating an optimal environment for Prionobrama filigera involves simulating the conditions of their natural habitat as closely as possible. This includes a well-planted aquarium with ample open swimming areas to accommodate their active swimming behavior. The use of floating plants can provide additional cover and reduce stress, while a substrate of fine sand or smooth gravel allows for the inclusion of bottom-dwelling plants and mimics the soft, plant-debris-rich bottom of their natural environment. While the Glass Bloodfin Tetra is adaptable to a range of water conditions, maintaining clean, well-oxygenated water with stable parameters is crucial for their health and well-being.

The diet of the Glass Bloodfin Tetra is omnivorous, with a natural inclination towards small invertebrates and plant matter. In captivity, their dietary needs can be met with high-quality flake foods, micro pellets, and live or frozen foods such as daphnia, brine shrimp, and bloodworms. Offering a mix of dietary items not only ensures they receive all the necessary nutrients but also caters to their natural foraging behavior, encouraging natural habits and promoting vibrant health.

Breeding Prionobrama filigera can be a rewarding experience, as they exhibit interesting spawning behaviors. They are egg scatterers, releasing their eggs among fine-leaved plants or in spawning mops. To encourage spawning, providing optimal water conditions and a nutritious diet are crucial. The fry are small and should be fed infusoria or commercially available fry foods until they are large enough to accept larger fare.

Caring for the Glass Bloodfin Tetra involves regular maintenance routines to ensure the water quality remains high, with frequent water changes and effective filtration. Their peaceful nature and small size make them excellent candidates for community tanks, where they can be kept with other similarly sized and non-aggressive fish species. However, their specific dietary, environmental, and social needs should be carefully considered to ensure a harmonious and healthy aquarium.

In summary, Prionobrama filigera, or the Glass Bloodfin Tetra, offers aquarists the opportunity to keep a small, peaceful, and visually stunning species that adds both visual interest and activity to the freshwater aquarium. While their care requires attention to their dietary, environmental, and social needs, the rewards of keeping Glass Bloodfin Tetras include the enjoyment of their striking appearance and the dynamic presence they bring to the aquatic setting, making them a favored choice for aquarists of all levels.