Description
Blackline Tail Tetra – Moenkhausia costae
Introduction:
The Blackline Tail Tetra (Moenkhausia costae) is a striking species of freshwater fish native to South America. Known for its slender body and distinctive black horizontal line along its tail, this species is a great addition to peaceful community aquariums. Typically, they grow to a size of 2 to 3 inches and are well-suited for mid- and top-water swimming. Their unique appearance and active behavior make them a delightful species for aquarium enthusiasts.
1. Natural Habitat and Behavior
- Natural Habitat: Found in the rivers of the Amazon Basin, the Blackline Tail Tetra thrives in slow-moving waters with dense vegetation. These fish are often found in areas with soft, slightly acidic water.
- Behavior: These tetras are active swimmers and are best kept in schools of 6 or more individuals. They exhibit peaceful behavior and are often seen swimming in the middle or top areas of the aquarium. Although social, they may become shy or skittish if kept in small groups.
2. Aquarium Setup
- Tank Size: A minimum of 20 gallons is recommended for a small school of Blackline Tail Tetras. Larger groups will require a larger tank to accommodate their active swimming behavior.
- Substrate: Fine gravel or sand is ideal, as it mimics the natural riverbeds they inhabit.
- Decor: Include plenty of plants, driftwood, and rocks to provide hiding spots and swimming space. Floating plants can also be used to replicate the dappled sunlight effect from their natural habitat.
- Water Conditions: These fish prefer slightly acidic to neutral water (pH 6.0 to 7.5), with a temperature range of 75°F to 80°F. Water hardness should be kept low to medium, and they do best in well-filtered water with stable conditions.
- Lighting: Moderate lighting is ideal. Floating plants can help create shaded areas that replicate their natural environment.
3. Diet and Feeding
- Diet: Blackline Tail Tetras are omnivores and will eat a variety of foods, including high-quality flake food, pellets, live or frozen foods (such as brine shrimp, daphnia, or bloodworms), and some plant matter like algae wafers or blanched vegetables.
- Feeding Schedule: Feed 2 to 3 times a day, offering small amounts of food that they can consume in a few minutes to avoid overfeeding and water quality issues.
4. Compatibility with Other Fish
- Compatible Species: These tetras are peaceful and get along well with other small, non-aggressive species. They do well in community tanks with species like rasboras, corydoras catfish, and other small tetras.
- Incompatible Species: Avoid keeping them with large or aggressive fish that may view them as food or threaten their peaceful nature.
5. Common Challenges and Tips
- Schooling Behavior: It’s essential to keep these fish in groups of 6 or more to help them feel secure and encourage natural schooling behavior. In smaller groups, they may become stressed or shy.
- Water Quality: Blackline Tail Tetras are sensitive to poor water quality, so regular water changes and proper filtration are necessary to keep them healthy.
- Tankmates: While peaceful, it’s important to avoid keeping them with fin-nipping species or overly active fish that could stress them.
Conclusion:
The Blackline Tail Tetra (Moenkhausia costae) is a wonderful addition to peaceful community aquariums. With their sleek body, unique coloration, and lively swimming patterns, they bring a lot of charm to the tank. By maintaining stable water conditions, providing them with a balanced diet, and keeping them in schools, they will thrive and offer enjoyment for aquarium hobbyists
