Can crayfish live with endlers?

Verdict
Yes

Yes, crayfish and endlers can live together. Both are fine at 72–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Endler's livebearerEndler's livebearer72–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Crayfish 65–77°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–8Crayfish 6.5–8Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inEndler's livebearer · 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

CrayfishEndler's livebearer
Temperature65–77 °F72–82 °F
pH6.5–87–8
Adult size5.0 in1.0 in
Minimum tank20 gal5 gal
TemperamentAggressivePeaceful
Swims atBottomTop
GroupOne per tankGroups of 3+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can crayfish live with endlers?

Yes, crayfish and endlers can live together. Both are fine at 72–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and endlers?

72–77 °F. Crayfish need 65–77 °F, endlers need 72–82 °F.

What size tank do crayfish and endlers need together?

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