Can crayfish live with zebra loaches?

Verdict
Yes

Yes. Crayfish and zebra loaches get along in the same tank. Both are fine at 73–77°F. Plan on at least 30 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Zebra loachZebra loach73–79°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°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inZebra loach · 3.5 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

CrayfishZebra loach
Temperature65–77 °F73–79 °F
pH6.5–86–7.5
Adult size5.0 in3.5 in
Minimum tank20 gal30 gal
TemperamentAggressivePeaceful
Swims atBottomBottom
GroupOne per tankGroups of 5+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can crayfish live with zebra loaches?

Yes. Crayfish and zebra loaches get along in the same tank. Both are fine at 73–77°F. Plan on at least 30 gal.

What temperature suits both crayfish and zebra loaches?

73–77 °F. Crayfish need 65–77 °F, zebra loaches need 73–79 °F.

What size tank do crayfish and zebra loaches need together?

At least 30 gal, set by the zebra loach. Add space for each extra fish.