Can mollies live with peacock cichlids?

Verdict
Yes

Yes, mollies and peacock cichlids can live together. Both are fine at 76–82°F. Plan on at least 55 gal.

MollyMolly72–82°F · pH 7.5–8.5 Peacock cichlidPeacock cichlid76–82°F · pH 7.8–8.6

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–82°Molly 72–82°Peacock cichlid 76–82°
The green band is the temperature range both can live in.
456789Both: 7.8–8.5Molly 7.5–8.5Peacock cichlid 7.8–8.6
The green band is the pH both tolerate.

Size to scale

Molly · 4 inPeacock cichlid · 6 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

MollyPeacock cichlid
Temperature72–82 °F76–82 °F
pH7.5–8.57.8–8.6
Adult size4.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atTopMiddle
GroupGroups of 3+Groups of 4+
DietOmnivoreCarnivore

Better tank mates for mollies

All molly tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can mollies live with peacock cichlids?

Yes, mollies and peacock cichlids can live together. Both are fine at 76–82°F. Plan on at least 55 gal.

What temperature suits both mollies and peacock cichlids?

76–82 °F. Mollies need 72–82 °F, peacock cichlids need 76–82 °F.

What size tank do mollies and peacock cichlids need together?

At least 55 gal, set by the peacock cichlid. Add space for each extra fish.