Can crayfish live with bolivian rams?

Verdict
Yes

Yes. Crayfish and bolivian rams get along in the same tank. Both are fine at 72–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Bolivian ramBolivian ram72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Crayfish 65–77°Bolivian ram 72–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Bolivian ram 6–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inBolivian ram · 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

CrayfishBolivian ram
Temperature65–77 °F72–79 °F
pH6.5–86–7.5
Adult size5.0 in3.0 in
Minimum tank20 gal20 gal
TemperamentAggressivePeaceful
Swims atBottomBottom
GroupOne per tankAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for bolivian rams

All bolivian ram tank mates

Questions

Can crayfish live with bolivian rams?

Yes. Crayfish and bolivian rams get along in the same tank. Both are fine at 72–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and bolivian rams?

72–77 °F. Crayfish need 65–77 °F, bolivian rams need 72–79 °F.

What size tank do crayfish and bolivian rams need together?

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