Can Jack Dempsey live with Oscar? With caution
Two aggressive species — needs space and broken sight lines.
Side by side
| 🐡 Jack Dempsey | 🐡 Oscar | |
| Adult size | 10" | 12" |
| Min tank | 55 gal | 75 gal |
| Temperature | 72–86°F | 74–81°F |
| pH | 6.5–8 | 6–8 |
| Temperament | Aggressive | Aggressive |
How to make it work
- Two aggressive species — needs space and broken sight lines.
- Provide ample swimming space, sight breaks, and matched water parameters.