đĻ Zebra Danio (Danio rerio)
The Zebra Danio is one of the hardiest and most active freshwater fish available. Their distinctive horizontal stripes and constant swimming make them excellent additions to community tanks. These energetic fish are often recommended for cycling new tanks due to their exceptional hardiness.
đ Quick Facts
| Scientific Name | Danio rerio |
|---|---|
| Adult Size | 2 inches (5 cm) |
| Minimum Tank | 10 gallons (38 liters) |
| Temperament | Peaceful, very active |
| Difficulty | Beginner |
| Lifespan | 3-5 years |
| Origin | India, Pakistan |
đ Varieties
- Wild Type - Blue and gold stripes
- Longfin - Extended flowing fins
- Leopard Danio - Spotted pattern
- GloFish - Genetically modified fluorescent colors
â ī¸ Important Considerations
- Very active swimmers - Need horizontal swimming space
- Schooling fish - Keep in groups of 6+
- Jumpers - Need a secure lid
- May chase slow fish - Their activity can stress others
đ Tank Requirements
- Tank Size: 10 gallons minimum, longer tanks preferred
- Swimming space: Need room to zoom
- Lid: Secure - they jump!
- Current: Appreciate some water flow
Water Parameters
| Temperature | 64-77°F (18-25°C) |
|---|---|
| pH | 6.5-7.5 |
| Hardness | 5-19 dGH |
| Ammonia/Nitrite | 0 ppm |
| Nitrate | <40 ppm |
đŊī¸ Diet & Feeding
Omnivores that eat almost anything.
- Quality flakes - Staple
- Micro pellets
- Frozen foods - Brine shrimp, daphnia
- Live foods - Great conditioning
Feed 2-3 times daily. Very active metabolism needs regular feeding.
đ Compatibility
Good Tankmates
- Other danios
- Tetras
- Barbs
- Corydoras
- Rainbowfish
- Livebearers
Avoid
- Slow-moving fish - Bettas, fancy guppies (may stress/nip)
- Large predatory fish
- Very shy species - Activity may stress them
đŦ Scientific Importance
Zebra Danios are one of the most important model organisms in scientific research. They're used to study genetics, development, disease, and toxicology due to their transparent embryos and fast reproduction.
đĄ Tips for Success
- Keep in schools of 6 or more
- Provide horizontal swimming space
- Secure lid is essential
- Great for beginners and cycling tanks
- Match with similarly active tankmates
đ Summary
Zebra Danios are the ultimate beginner fish - hardy, active, and endlessly entertaining. Their constant swimming brings energy to any tank. Just make sure they have enough room to zoom around and a secure lid to prevent escapes!