Can Betta Live With Common Goldfish?
Betta and Common Goldfish are NOT compatible tank mates.
Detailed Analysis
Known Pairing
✗ Not Compatible
Goldfish are coldwater; bettas are tropical. Completely incompatible temperature needs.
Temperature
✗ Not Compatible
No temperature overlap. Betta needs 76–82°F, but Common Goldfish needs 50–74°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (12" vs 3"). Common Goldfish may bully or stress Betta.
Temperament
✗ Not Compatible
Betta (aggressive) is not compatible with Common Goldfish (peaceful). Aggression or stress is very likely.
Swim Level
✓ Compatible
Swim level compatibility is fine.
Trait Conflict
✗ Not Compatible
Common Goldfish is a coldwater species and should not be kept with tropical fish like Betta.
Tank Requirements
Minimum tank size for this combination: 30 gallons
| Parameter | Betta | Common Goldfish |
|---|---|---|
| Temperature | 76–82°F | 50–74°F |
| pH | 6.5–7.5 | 6.5–8 |
| Max Size | 3" | 12" |
| Temperament | Aggressive | Peaceful |
| Swim Level | Top | All |
| Min Tank | 5 gal | 30 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.