Can convict cichlids live with crayfish?

Verdict
Yes

Yes. Convict cichlids and crayfish make a good pair. Both are fine at 74–77°F. Plan on at least 30 gal.

Convict cichlidConvict cichlid74–82°F · pH 6.6–7.8 CrayfishCrayfish65–77°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–77°Convict cichlid 74–82°Crayfish 65–77°
The green band is the temperature range both can live in.
456789Both: 6.6–7.8Convict cichlid 6.6–7.8Crayfish 6.5–8
The green band is the pH both tolerate.

Size to scale

Convict cichlid · 5 inCrayfish · 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

Convict cichlidCrayfish
Temperature74–82 °F65–77 °F
pH6.6–7.86.5–8
Adult size5.0 in5.0 in
Minimum tank30 gal20 gal
TemperamentAggressiveAggressive
Swims atBottomBottom
GroupAlone or in pairsOne per tank
DietOmnivoreOmnivore

Better tank mates for convict cichlids

All convict cichlid tank mates

Better tank mates for crayfish

All crayfish tank mates

Questions

Can convict cichlids live with crayfish?

Yes. Convict cichlids and crayfish make a good pair. Both are fine at 74–77°F. Plan on at least 30 gal.

What temperature suits both convict cichlids and crayfish?

74–77 °F. Convict cichlids need 74–82 °F, crayfish need 65–77 °F.

What size tank do convict cichlids and crayfish need together?

At least 30 gal, set by the convict cichlid. Add space for each extra fish.