Description
Fireline Danio – Devario sondhii:
Introduction
The Fireline Danio (Devario sondhii) is a lively and colorful freshwater fish, renowned for its shimmering silver body and the distinct fiery stripe that runs along its flank. Growing to a modest size of 2–2.5 inches (5–6 cm), this species is an excellent addition to peaceful community tanks. Its energetic swimming patterns and schooling behavior make it a captivating sight for aquarists of all levels.
1. Natural Habitat and Behavior
Native to fast-flowing streams and rivers in South Asia, the Fireline Danio thrives in well-oxygenated waters with rocky or sandy substrates. In its natural habitat, it is part of a schooling community, often darting among vegetation and feeding on insects and algae. It is an active and social species, happiest in groups of six or more.
2. Aquarium Setup
- Tank Size: Minimum 20 gallons (75 liters) for a small group; larger tanks enhance schooling behavior.
- Substrate: Fine gravel or sand to mimic its natural riverbed habitat.
- Decor: Provide ample swimming space with scattered rocks, driftwood, and hardy plants like Vallisneria or Java Fern.
- Water Conditions:
- Temperature: 72–78°F (22–26°C)
- pH: 6.5–7.5
- Hardness: Soft to moderately hard water
- Lighting: Moderate to bright, enhancing their reflective scales.
- Filtration: A strong filtration system with moderate water flow is ideal for replicating their native environment.
3. Diet and Feeding
The Fireline Danio is an omnivore with a preference for small, protein-rich foods. A varied diet includes:
- Live/Frozen Foods: Daphnia, brine shrimp, and mosquito larvae.
- Dry Foods: High-quality flakes or micro-pellets.
- Vegetation: Occasional blanched vegetables or spirulina-based supplements.
Feed 1–2 times daily, providing only as much as they can consume within a few minutes.
4. Compatibility with Other Fish
- Ideal Tank Mates:
- Other peaceful schooling fish such as Tetras, Rasboras, or Barbs.
- Bottom-dwellers like Corydoras or small Loaches.
- Avoid:
- Large or aggressive species that may intimidate or prey on them.
- Slow-moving fish, as the danio’s activity level may cause stress.
5. Common Challenges and Tips
- Activity Levels: These fish are very active swimmers. Ensure sufficient swimming space and a securely fitted lid, as they may jump.
- Group Dynamics: Keeping them in schools of at least six individuals minimizes stress and enhances natural behavior.
- Water Quality: Maintain consistent water parameters with regular water changes (25–30% weekly) to keep them healthy.
- Diet Variation: A balanced diet is essential for their vibrant coloration and overall health.
Conclusion
The Fireline Danio (Devario sondhii) is a delightful and engaging addition to any community tank. Its vivid colors, active schooling behavior, and ease of care make it a perfect choice for aquarists of all experience levels. With proper care and a suitable environment, these fish will thrive and bring life to your aquarium.
