Can platies live with yellow labs?

Verdict
Yes

Yes, platies and yellow labs can live together. Both are fine at 75–80°F. Plan on at least 40 gal.

PlatyPlaty70–80°F · pH 7–8.2 Electric yellow cichlidElectric yellow cichlid75–82°F · pH 7.8–8.6

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Platy 70–80°Electric yellow cichlid 75–82°
The green band is the temperature range both can live in.
456789Both: 7.8–8.2Platy 7–8.2Electric yellow cichlid 7.8–8.6
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 inElectric yellow cichlid · 4 in0"1"2"3"4"5"6"
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

PlatyElectric yellow cichlid
Temperature70–80 °F75–82 °F
pH7–8.27.8–8.6
Adult size2.5 in4.0 in
Minimum tank10 gal40 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleAll levels
GroupGroups of 3+Groups of 4+
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for yellow labs

All electric yellow cichlid tank mates

Questions

Can platies live with yellow labs?

Yes, platies and yellow labs can live together. Both are fine at 75–80°F. Plan on at least 40 gal.

What temperature suits both platies and yellow labs?

75–80 °F. Platies need 70–80 °F, yellow labs need 75–82 °F.

What size tank do platies and yellow labs need together?

At least 40 gal, set by the electric yellow cichlid. Add space for each extra fish.