Can mollies live with arowanas?
Verdict
No
No. Mollies and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 4 inches mollies do.
What to watch
- Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 4 inches mollies do.
- Deal breakerArowanas are aggressive and will bully peaceful mollies.
- Watch outDifferent water: mollies want pH 7.5–8.5, arowanas want pH 6–7.
- Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for mollies.
What works
- Both are fine at 75–82°F.
Water side by side
Size to scale
Care at a glance
| Molly | Silver arowana | |
|---|---|---|
| Temperature | 72–82 °F | 75–86 °F |
| pH | 7.5–8.5 | 6–7 |
| Adult size | 4.0 in | 36.0 in |
| Minimum tank | 20 gal | 250 gal |
| Temperament | Peaceful | Aggressive |
| Swims at | Top | Top |
| Group | Groups of 3+ | One per tank |
| Diet | Omnivore | Carnivore |
Better tank mates for mollies
Questions
Can mollies live with arowanas?
No. Mollies and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 4 inches mollies do.
What temperature suits both mollies and arowanas?
75–82 °F. Mollies need 72–82 °F, arowanas need 75–86 °F.
What size tank do mollies and arowanas need together?
At least 250 gal, set by the silver arowana. Add space for each extra fish.