Can oscars live with platies?

Verdict
No

No. Oscars and platies should not share a tank. An adult oscar 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: 74–80°Oscar 74–81°Platy 70–80°
The green band is the temperature range both can live in.
456789Both: 7–8Oscar 6–8Platy 7–8.2
The green band is the pH both tolerate.

Size to scale

Oscar · 12 inPlaty · 2.5 in0"2"4"6"8"10"12"
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

OscarPlaty
Temperature74–81 °F70–80 °F
pH6–87–8.2
Adult size12.0 in2.5 in
Minimum tank75 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupAlone or in pairsGroups of 3+
DietCarnivoreOmnivore

Better tank mates for oscars

All oscar tank mates

Better tank mates for platies

All platy tank mates

Questions

Can oscars live with platies?

No. Oscars and platies should not share a tank. An adult oscar eats fish that fit in its mouth, and at 2.5 inches platies do.

What temperature suits both oscars and platies?

74–80 °F. Oscars need 74–81 °F, platies need 70–80 °F.

What size tank do oscars and platies need together?

At least 75 gal, set by the oscar. Add space for each extra fish.