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Danio
Danio are active, fast-swimming Asian schooling fish popular in community aquariums. Zebra Danios are the most well-known species.
3 species indexed
What is Danio?
Danio is a genus of small, energetic freshwater fish native to South and Southeast Asia. They are hardy, social fish often recommended for beginners.
Typical habitat and water envelope
Danios inhabit streams, rivers and flooded fields across India, Bangladesh and surrounding regions. Many species tolerate a wide range of conditions.
| Temperature (typical) | 18 to 25 C |
| pH (typical) | 6.5 to 8 |
| Hardness band (typical) | soft to hard |
| Flow (typical) | medium |
Informational only: compatibility logic remains species-level.
Compare species in Danio
3 species shown
| Name | Size | Temperament |
|---|---|---|
 Celestial Pearl Danio Danio margaritatus | 2.1 | peaceful |
 Emerald Dwarf Rasbora Danio erythromicron | 2.5 | peaceful |
 Zebra danio Danio rerio | 5.0 | peaceful |
| Species | Size (cm) | Temp (C) | pH | Hardness | Flow | Temperament |
|---|---|---|---|---|---|---|
Celestial Pearl Danio Danio margaritatus | 2.1 | 15.0 to 24.0 C | 7.0 to 8.0 | medium to hard | low | peaceful |
Emerald Dwarf Rasbora Danio erythromicron | 2.5 | 21.0 to 25.0 C | 7.0 to 7.8 | medium to hard | medium | peaceful |
Zebra danio Danio rerio | 5.0 | 15.0 to 24.0 C | 6.0 to 8.0 | soft to hard | medium | peaceful |