Can crayfish live with glass catfish?

Verdict
Yes

Yes, crayfish and glass catfish can live together. Both are fine at 75–77°F. Plan on at least 30 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Glass catfishGlass catfish75–80°F · pH 6.5–7.5

Why it works

Water side by side

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

Size to scale

Crayfish · 5 inGlass catfish · 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

CrayfishGlass catfish
Temperature65–77 °F75–80 °F
pH6.5–86.5–7.5
Adult size5.0 in3.0 in
Minimum tank20 gal30 gal
TemperamentAggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreCarnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for glass catfish

All glass catfish tank mates

Questions

Can crayfish live with glass catfish?

Yes, crayfish and glass catfish can live together. Both are fine at 75–77°F. Plan on at least 30 gal.

What temperature suits both crayfish and glass catfish?

75–77 °F. Crayfish need 65–77 °F, glass catfish need 75–80 °F.

What size tank do crayfish and glass catfish need together?

At least 30 gal, set by the glass catfish. Add space for each extra fish.