Can Harlequin Rasbora live with Oscar? Not recommended
Oscar is large or predatory enough to eat or harass Harlequin Rasbora.
Side by side
| 🐟 Harlequin Rasbora | 🐡 Oscar | |
| Adult size | 2" | 12" |
| Min tank | 15 gal | 75 gal |
| Temperature | 72–80°F | 74–81°F |
| pH | 6–7.5 | 6–8 |
| Temperament | Peaceful | Aggressive |
Why
- Oscar is large or predatory enough to eat or harass Harlequin Rasbora.
- Aggressive plus peaceful pairing — monitor for stress.