Can bettas live with goldfish?
❌ Not recommended No, it's not recommended
- ❌ Not recommended Coldwater and tropical fish don't mix: Betta fish 22–30 °C (72–86 °F) vs Fancy goldfish 20–23 °C (68–73 °F).
- ⚠️ Caution An adult fancy goldfish (up to 20 cm) may try to eat smaller betta fish (7 cm), especially at night.
- ⚠️ Caution Goldfish are coldwater fish that produce a lot of waste; they are usually kept only with other goldfish.
| Betta fish | Fancy goldfish | |
| Temperature | 72–86 °F (22–30 °C) | 68–73 °F (20–23 °C) |
| pH | 6–8 | 7–8 |
| Adult size | 2.8 in (7 cm) | 7.9 in (20 cm) |
| Temperament | Semi-aggressive | Peaceful |
| Swims in | Top | All levels |
| Minimum tank | 10 gal | 20 gal |
Shared temperature: 72–73 °F (22–23 °C) · Shared pH: 7–8
If you already have both
- Separate them as soon as possible, or rehome one of them. Use a divider in the meantime.
See all betta fish tank mates and fancy goldfish tank mates, or add more species in the checker.
FAQ
Can bettas live with goldfish?
No, it's not recommended. Coldwater and tropical fish don't mix: Betta fish 22–30 °C (72–86 °F) vs Fancy goldfish 20–23 °C (68–73 °F). An adult fancy goldfish (up to 20 cm) may try to eat smaller betta fish (7 cm), especially at night.
What temperature for bettas and goldfish?
Betta fish: 72–86 °F (22–30 °C). Fancy goldfish: 68–73 °F (20–23 °C). Shared range: 72–73 °F (22–23 °C).
What size tank for bettas and goldfish?
At least 20 US gallons, more as you add fish.
Note: Compatibility depends on individual temperament, tank size, decor and how fish are introduced. Our verdicts use conservative rules applied to published care data (see methodology). They are guidance, not a guarantee. Quarantine new fish and watch for chasing, torn fins or hiding.