Can crayfish live with clown plecos?

Verdict
Yes

Yes. Crayfish and clown plecos make a good pair. Both are fine at 73–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Clown plecoClown pleco73–82°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–77°Crayfish 65–77°Clown pleco 73–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Clown pleco 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inClown pleco · 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

CrayfishClown pleco
Temperature65–77 °F73–82 °F
pH6.5–86.5–7.5
Adult size5.0 in3.5 in
Minimum tank20 gal20 gal
TemperamentAggressivePeaceful
Swims atBottomBottom
GroupOne per tankAlone or in pairs
DietOmnivoreHerbivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for clown plecos

All clown pleco tank mates

Questions

Can crayfish live with clown plecos?

Yes. Crayfish and clown plecos make a good pair. Both are fine at 73–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and clown plecos?

73–77 °F. Crayfish need 65–77 °F, clown plecos need 73–82 °F.

What size tank do crayfish and clown plecos need together?

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