Can platies live with arowanas?

Verdict
No

No. Platies and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches platies do.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Platy 70–80°Silver arowana 75–86°
The green band is the temperature range both can live in.
456789Both: 7Platy 7–8.2Silver arowana 6–7
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 inSilver arowana · 36 in0"6"12"18"24"30"36"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

PlatySilver arowana
Temperature70–80 °F75–86 °F
pH7–8.26–7
Adult size2.5 in36.0 in
Minimum tank10 gal250 gal
TemperamentPeacefulAggressive
Swims atMiddleTop
GroupGroups of 3+One per tank
DietOmnivoreCarnivore

Better tank mates for platies

All platy tank mates

Questions

Can platies live with arowanas?

No. Platies and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches platies do.

What temperature suits both platies and arowanas?

75–80 °F. Platies need 70–80 °F, arowanas need 75–86 °F.

What size tank do platies and arowanas need together?

At least 250 gal, set by the silver arowana. Add space for each extra fish.