Can Common Goldfish live with Jack Dempsey? With caution
Aggressive plus peaceful pairing — monitor for stress.
Side by side
| 🐠 Common Goldfish | 🐡 Jack Dempsey | |
| Adult size | 12" | 10" |
| Min tank | 40 gal | 55 gal |
| Temperature | 60–72°F | 72–86°F |
| pH | 6.5–8 | 6.5–8 |
| Temperament | Peaceful | Aggressive |
How to make it work
- Aggressive plus peaceful pairing — monitor for stress.
- Provide ample swimming space, sight breaks, and matched water parameters.