Can crayfish live with black skirt tetras?

Verdict
Yes

Yes, crayfish and black skirt tetras can live together. Both are fine at 70–77°F. Plan on at least 20 gal.

CrayfishCrayfish65–77°F · pH 6.5–8 Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 70–77°Crayfish 65–77°Black skirt tetra 70–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Crayfish 6.5–8Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Crayfish · 5 inBlack skirt tetra · 2.5 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

CrayfishBlack skirt tetra
Temperature65–77 °F70–80 °F
pH6.5–86–7.5
Adult size5.0 in2.5 in
Minimum tank20 gal15 gal
TemperamentAggressiveSemi-aggressive
Swims atBottomMiddle
GroupOne per tankGroups of 6+
DietOmnivoreOmnivore

Better tank mates for crayfish

All crayfish tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can crayfish live with black skirt tetras?

Yes, crayfish and black skirt tetras can live together. Both are fine at 70–77°F. Plan on at least 20 gal.

What temperature suits both crayfish and black skirt tetras?

70–77 °F. Crayfish need 65–77 °F, black skirt tetras need 70–80 °F.

What size tank do crayfish and black skirt tetras need together?

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