Can bichirs live with mollies?
Verdict
No
No. Bichirs and mollies should not share a tank. An adult bichir eats fish that fit in its mouth, and at 4 inches mollies do.
What to watch
- Deal breakerAn adult bichir eats fish that fit in its mouth, and at 4 inches mollies do.
- Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.5.
What works
- Both are fine at 72–82°F.
- They use different parts of the tank: bichirs the bottom, mollies the top.
Water side by side
Size to scale
Care at a glance
| Bichir | Molly | |
|---|---|---|
| Temperature | 72–82 °F | 72–82 °F |
| pH | 6.5–7.5 | 7.5–8.5 |
| Adult size | 12.0 in | 4.0 in |
| Minimum tank | 75 gal | 20 gal |
| Temperament | Semi-aggressive | Peaceful |
| Swims at | Bottom | Top |
| Group | Alone or in pairs | Groups of 3+ |
| Diet | Carnivore | Omnivore |
Better tank mates for bichirs
Better tank mates for mollies
Questions
Can bichirs live with mollies?
No. Bichirs and mollies should not share a tank. An adult bichir eats fish that fit in its mouth, and at 4 inches mollies do.
What temperature suits both bichirs and mollies?
72–82 °F. Bichirs need 72–82 °F, mollies need 72–82 °F.
What size tank do bichirs and mollies need together?
At least 75 gal, set by the bichir. Add space for each extra fish.