Can crayfish live with blue gouramis?

Verdict
Yes

Yes. Crayfish and blue gouramis get along in the same tank. Both are fine at 72–77°F. Plan on at least 30 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Crayfish 65–77°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–8Crayfish 6.5–8Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inBlue gourami · 5 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

CrayfishBlue gourami
Temperature65–77 °F72–82 °F
pH6.5–86–8
Adult size5.0 in5.0 in
Minimum tank20 gal30 gal
TemperamentAggressiveSemi-aggressive
Swims atBottomTop
GroupOne per tankAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can crayfish live with blue gouramis?

Yes. Crayfish and blue gouramis get along in the same tank. Both are fine at 72–77°F. Plan on at least 30 gal.

What temperature suits both crayfish and blue gouramis?

72–77 °F. Crayfish need 65–77 °F, blue gouramis need 72–82 °F.

What size tank do crayfish and blue gouramis need together?

At least 30 gal, set by the blue gourami. Add space for each extra fish.