Can crayfish live with pictus catfish?

Verdict
Yes

Yes, crayfish and pictus catfish can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Pictus catfishPictus catfish72–79°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°Pictus catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Pictus catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inPictus catfish · 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

CrayfishPictus catfish
Temperature65–77 °F72–79 °F
pH6.5–86–7.5
Adult size5.0 in5.0 in
Minimum tank20 gal55 gal
TemperamentAggressiveSemi-aggressive
Swims atBottomBottom
GroupOne per tankGroups of 3+
DietOmnivoreCarnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for pictus catfish

All pictus catfish tank mates

Questions

Can crayfish live with pictus catfish?

Yes, crayfish and pictus catfish can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both crayfish and pictus catfish?

72–77 °F. Crayfish need 65–77 °F, pictus catfish need 72–79 °F.

What size tank do crayfish and pictus catfish need together?

At least 55 gal, set by the pictus catfish. Add space for each extra fish.