Can mollies live with yellow labs?

Verdict
Yes

Yes. Mollies and yellow labs make a good pair. Both are fine at 75–82°F. Plan on at least 40 gal.

MollyMolly72–82°F · pH 7.5–8.5 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: 75–82°Molly 72–82°Electric yellow cichlid 75–82°
The green band is the temperature range both can live in.
456789Both: 7.8–8.5Molly 7.5–8.5Electric yellow cichlid 7.8–8.6
The green band is the pH both tolerate.

Size to scale

Molly · 4 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

MollyElectric yellow cichlid
Temperature72–82 °F75–82 °F
pH7.5–8.57.8–8.6
Adult size4.0 in4.0 in
Minimum tank20 gal40 gal
TemperamentPeacefulSemi-aggressive
Swims atTopAll levels
GroupGroups of 3+Groups of 4+
DietOmnivoreOmnivore

Better tank mates for mollies

All molly tank mates

Better tank mates for yellow labs

All electric yellow cichlid tank mates

Questions

Can mollies live with yellow labs?

Yes. Mollies and yellow labs make a good pair. Both are fine at 75–82°F. Plan on at least 40 gal.

What temperature suits both mollies and yellow labs?

75–82 °F. Mollies need 72–82 °F, yellow labs need 75–82 °F.

What size tank do mollies and yellow labs need together?

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