Can crayfish live with dojo loaches?

Verdict
Yes

Yes, crayfish and dojo loaches can live together. Both are fine at 65–77°F. Plan on at least 55 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Dojo loachDojo loach59–77°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 65–77°Crayfish 65–77°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–8Crayfish 6.5–8Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inDojo loach · 6 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

CrayfishDojo loach
Temperature65–77 °F59–77 °F
pH6.5–86.5–8
Adult size5.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentAggressivePeaceful
Swims atBottomBottom
GroupOne per tankGroups of 3+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can crayfish live with dojo loaches?

Yes, crayfish and dojo loaches can live together. Both are fine at 65–77°F. Plan on at least 55 gal.

What temperature suits both crayfish and dojo loaches?

65–77 °F. Crayfish need 65–77 °F, dojo loaches need 59–77 °F.

What size tank do crayfish and dojo loaches need together?

At least 55 gal, set by the dojo loach. Add space for each extra fish.