Origins and Classification
- Scientific Name: Danio rerio (Longfin variety)
- Family: Cyprinidae
- Origin: Native to India, Bangladesh, Nepal, and Bhutan, where they inhabit clear streams, rice paddies, and slow-moving waters. The Fancy Longfin variety is selectively bred for its elongated, flowing fins and enhanced color.
- Popularity: Extremely popular for community tanks due to their hardiness, peaceful schooling behavior, and eye-catching long fins.
🎨 Appearance
- Color:
- Classic blue and silver horizontal stripes from head to tail.
- Enhanced shine under aquarium lighting.
- Structure:
- Long, flowing fins (especially dorsal, anal, and tail fins).
- Slender, torpedo-shaped body built for active swimming.
- Size:
- Typically 2–2.5 inches (5–6.5 cm).
- Lifespan: 3–5 years with proper care.
🏡 Tank Requirements
- Tank Size: Minimum 15–20 gallons for a school; long tanks preferred.
- Water Parameters:
- Temperature: 64–75°F (18–24°C)
- pH: 6.5–7.5
- Hardness: 5–12 dGH
- Lighting: Moderate; highlights shimmer of stripes.
- Habitat Setup:
- Plenty of open swimming space.
- Add plants around the edges (Java Fern, Water Wisteria) for comfort.
- Gentle flow mimics natural streams.
