Can convict cichlids live with killifish?

Verdict
No

No. Convict cichlids and killifish should not share a tank. Convict cichlids are aggressive and will bully peaceful killifish.

Convict cichlidConvict cichlid74–82°F · pH 6.6–7.8 KillifishKillifish70–77°F · pH 5.5–7

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–77°Convict cichlid 74–82°Killifish 70–77°
The green band is the temperature range both can live in.
456789Both: 6.6–7Convict cichlid 6.6–7.8Killifish 5.5–7
The green band is the pH both tolerate.

Size to scale

Convict cichlid · 5 inKillifish · 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

Convict cichlidKillifish
Temperature74–82 °F70–77 °F
pH6.6–7.85.5–7
Adult size5.0 in2.5 in
Minimum tank30 gal10 gal
TemperamentAggressivePeaceful
Swims atBottomTop
GroupAlone or in pairsAlone or in pairs
DietOmnivoreCarnivore

Better tank mates for convict cichlids

All convict cichlid tank mates

Better tank mates for killifish

All killifish tank mates

Questions

Can convict cichlids live with killifish?

No. Convict cichlids and killifish should not share a tank. Convict cichlids are aggressive and will bully peaceful killifish.

What temperature suits both convict cichlids and killifish?

74–77 °F. Convict cichlids need 74–82 °F, killifish need 70–77 °F.

What size tank do convict cichlids and killifish need together?

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