Can Oscar live with Upside-Down Catfish? Not recommended
Oscar is large or predatory enough to eat or harass Upside-Down Catfish.
Side by side
| 🐡 Oscar | 🐡 Upside-Down Catfish | |
| Adult size | 12" | 3.5" |
| Min tank | 75 gal | 20 gal |
| Temperature | 74–81°F | 72–82°F |
| pH | 6–8 | 6–7.5 |
| Temperament | Aggressive | Peaceful |
Why
- Oscar is large or predatory enough to eat or harass Upside-Down Catfish.
- Aggressive plus peaceful pairing — monitor for stress.