Can crayfish live with celestial pearl danios?

Verdict
Yes

Yes. Crayfish and celestial pearl danios make a good pair. Both are fine at 72–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Celestial pearl danioCelestial pearl danio72–79°F · pH 6.5–7.5

Why it works

Water side by side

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

Size to scale

Crayfish · 5 inCelestial pearl danio · 1 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

CrayfishCelestial pearl danio
Temperature65–77 °F72–79 °F
pH6.5–86.5–7.5
Adult size5.0 in1.0 in
Minimum tank20 gal10 gal
TemperamentAggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for celestial pearl danios

All celestial pearl danio tank mates

Questions

Can crayfish live with celestial pearl danios?

Yes. Crayfish and celestial pearl danios make a good pair. Both are fine at 72–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and celestial pearl danios?

72–77 °F. Crayfish need 65–77 °F, celestial pearl danios need 72–79 °F.

What size tank do crayfish and celestial pearl danios need together?

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