Can killifish live with arowanas?
Verdict
No
No. Killifish and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches killifish do.
What to watch
- Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 2.5 inches killifish do.
- Deal breakerArowanas are aggressive and will bully peaceful killifish.
- Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for killifish.
What works
- Both are fine at 75–77°F.
- pH 6–7 suits both.
Water side by side
Size to scale
Care at a glance
| Killifish | Silver arowana | |
|---|---|---|
| Temperature | 70–77 °F | 75–86 °F |
| pH | 5.5–7 | 6–7 |
| Adult size | 2.5 in | 36.0 in |
| Minimum tank | 10 gal | 250 gal |
| Temperament | Peaceful | Aggressive |
| Swims at | Top | Top |
| Group | Alone or in pairs | One per tank |
| Diet | Carnivore | Carnivore |
Better tank mates for killifish
Questions
Can killifish live with arowanas?
No. Killifish and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches killifish do.
What temperature suits both killifish and arowanas?
75–77 °F. Killifish need 70–77 °F, arowanas need 75–86 °F.
What size tank do killifish and arowanas need together?
At least 250 gal, set by the silver arowana. Add space for each extra fish.