Can oscars live with arowanas?
Verdict
No
No. Oscars and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 12 inches oscars do.
What to watch
- Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 12 inches oscars do.
- Deal breakerArowanas are aggressive and much bigger than oscars.
What works
- Both are fine at 75–81°F.
- pH 6–7 suits both.
- They use different parts of the tank: oscars the mid, arowanas the top.
Water side by side
Size to scale
Care at a glance
| Oscar | Silver arowana | |
|---|---|---|
| Temperature | 74–81 °F | 75–86 °F |
| pH | 6–8 | 6–7 |
| Adult size | 12.0 in | 36.0 in |
| Minimum tank | 75 gal | 250 gal |
| Temperament | Semi-aggressive | Aggressive |
| Swims at | Middle | Top |
| Group | Alone or in pairs | One per tank |
| Diet | Carnivore | Carnivore |
Better tank mates for oscars
Common plecoYes
Clown loachYes
Black ghost knifeYes
BichirYes
Elephant nose fishYes
Chinese algae eaterYes
Questions
Can oscars live with arowanas?
No. Oscars and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 12 inches oscars do.
What temperature suits both oscars and arowanas?
75–81 °F. Oscars need 74–81 °F, arowanas need 75–86 °F.
What size tank do oscars and arowanas need together?
At least 250 gal, set by the silver arowana. Add space for each extra fish.