Can crayfish live with cherry barbs?

Verdict
Yes

Yes, crayfish and cherry barbs can live together. Both are fine at 73–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Cherry barbCherry barb73–81°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–77°Crayfish 65–77°Cherry barb 73–81°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Cherry barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inCherry barb · 2 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

CrayfishCherry barb
Temperature65–77 °F73–81 °F
pH6.5–86–7.5
Adult size5.0 in2.0 in
Minimum tank20 gal20 gal
TemperamentAggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for cherry barbs

All cherry barb tank mates

Questions

Can crayfish live with cherry barbs?

Yes, crayfish and cherry barbs can live together. Both are fine at 73–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and cherry barbs?

73–77 °F. Crayfish need 65–77 °F, cherry barbs need 73–81 °F.

What size tank do crayfish and cherry barbs need together?

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