Can Oscar live with Red Swordtail? Not recommended
Oscar is large or predatory enough to eat or harass Red Swordtail.
Side by side
| 🐡 Oscar | 🐠 Red Swordtail | |
| Adult size | 12" | 5.5" |
| Min tank | 75 gal | 20 gal |
| Temperature | 74–81°F | 72–82°F |
| pH | 6–8 | 7–8.4 |
| Temperament | Aggressive | Semi-aggressive |
Why
- Oscar is large or predatory enough to eat or harass Red Swordtail.
- Aggressive plus semi-aggressive pairing — watch for territorial disputes.