Can Molly live with Oscar? Not recommended
Oscar is large or predatory enough to eat or harass Molly.
Side by side
| 🐠 Molly | 🐡 Oscar | |
| Adult size | 4.5" | 12" |
| Min tank | 20 gal | 75 gal |
| Temperature | 72–82°F | 74–81°F |
| pH | 7.5–8.5 | 6–8 |
| Temperament | Peaceful | Aggressive |
Why
- Oscar is large or predatory enough to eat or harass Molly.
- Aggressive plus peaceful pairing — monitor for stress.