Can bettas live with pygmy corys?

Verdict
Yes

Yes, bettas and pygmy corys can live together. Both are fine at 76–79°F. Plan on at least 10 gal.

BettaBetta76–82°F · pH 6.5–7.5 Pygmy coryPygmy cory72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–79°Betta 76–82°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Betta 6.5–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 inPygmy cory · 1 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

BettaPygmy cory
Temperature76–82 °F72–79 °F
pH6.5–7.56–7.5
Adult size2.5 in1.0 in
Minimum tank5 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 6+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can bettas live with pygmy corys?

Yes, bettas and pygmy corys can live together. Both are fine at 76–79°F. Plan on at least 10 gal.

What temperature suits both bettas and pygmy corys?

76–79 °F. Bettas need 76–82 °F, pygmy corys need 72–79 °F.

What size tank do bettas and pygmy corys need together?

At least 10 gal, set by the pygmy cory. Add space for each extra fish.