Can corydoras live with mollies?

Verdict
Yes

Yes. Corydoras and mollies make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 MollyMolly72–82°F · pH 7.5–8.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Corydoras 72–79°Molly 72–82°
The green band is the temperature range both can live in.
456789Both: 7.5–7.8Corydoras 6–7.8Molly 7.5–8.5
The green band is the pH both tolerate.

Size to scale

Corydoras · 2.5 inMolly · 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

CorydorasMolly
Temperature72–79 °F72–82 °F
pH6–7.87.5–8.5
Adult size2.5 in4.0 in
Minimum tank20 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomTop
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for mollies

All molly tank mates

Questions

Can corydoras live with mollies?

Yes. Corydoras and mollies make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both corydoras and mollies?

72–79 °F. Corydoras need 72–79 °F, mollies need 72–82 °F.

What size tank do corydoras and mollies need together?

At least 20 gal, set by the corydoras. Add space for each extra fish.