Black Tetra

The Black Tetra (Gymnocorymbus ternetzi), also known as the petticoat tetra, is a popular freshwater fish characterized by its deep black coloration and transparent fins. This species is native to the slow-moving waters of the Amazon Basin, where it thrives in schools among submerged vegetation. Its graceful movements and schooling behavior make it a captivating addition to any aquarium, especially in community settings.

Physically, the Black Tetra can reach a maximum size of about 5 cm (2 inches). Its body is laterally compressed, which enhances its elegance as it swims. The striking contrast of its black body with the delicate, translucent fins creates a visually appealing look that aquarists adore. Young Black Tetras may exhibit a more muted color, gradually intensifying as they mature.

Behaviorally, Black Tetras are peaceful and social fish that prefer to be in groups of at least six. They display interesting schooling behavior, darting around the tank in a synchronized manner. While they are generally non-aggressive, they can become territorial during breeding, so providing ample hiding spaces is essential in a community tank.

In their natural habitat, Black Tetras inhabit soft, acidic waters rich in plant life. They thrive in dimly lit environments, often found near riverbanks where they can hide among aquatic plants. Mimicking these conditions in aquarium settings will promote their health and well-being, making them an ideal choice for aquarists seeking to replicate a natural ecosystem.

To ensure optimal health for Black Tetras, maintain water conditions within the range of 22-28°C (72-82°F) with a pH of 6.0 to 7.5. They prefer soft, slightly acidic water, which can be achieved through the use of peat filtration or by adding driftwood. Regular water changes and a quality filtration system are crucial to maintaining water quality and clarity.

Black Tetras are omnivorous and should be fed a varied diet consisting of high-quality flake food, micro-pellets, and occasional live or frozen treats such as brine shrimp or daphnia. This dietary diversity will enhance their coloration and overall health. Feeding should occur 2-3 times a day, ensuring that any uneaten food is promptly removed to maintain water quality.

In terms of compatibility, Black Tetras are best kept with other peaceful species, such as small tetras, rasboras, and community fish. Avoid housing them with larger, aggressive fish that may see them as prey. Acclimation is essential when introducing new fish; use the drip acclimation method to minimize stress and shock. Quarantine new arrivals for at least two weeks to prevent the spread of diseases to the main tank.

Black Tetras are suitable for shipping due to their hardiness. It is recommended to pack them in breathable bags with adequate oxygen and minimal water to reduce stress during transit. Maintain a stable temperature between 22-28°C (72-82°F) during shipping. As a non-CITES species, they do not require special documentation for export.