Can crayfish live with gold barbs?

Verdict
Yes

Yes. Crayfish and gold barbs make a good pair. Both are fine at 65–75°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Gold barbGold barb64–75°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 65–75°Crayfish 65–77°Gold barb 64–75°
The green band is the temperature range both can live in.
456789Both: 6.5–8Crayfish 6.5–8Gold barb 6–8
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inGold barb · 3 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

CrayfishGold barb
Temperature65–77 °F64–75 °F
pH6.5–86–8
Adult size5.0 in3.0 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 gold barbs

All gold barb tank mates

Questions

Can crayfish live with gold barbs?

Yes. Crayfish and gold barbs make a good pair. Both are fine at 65–75°F. Plan on at least 20 gal.

What temperature suits both crayfish and gold barbs?

65–75 °F. Crayfish need 65–77 °F, gold barbs need 64–75 °F.

What size tank do crayfish and gold barbs need together?

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