Can killifish live with apistogramma?

Verdict
Yes

Yes, killifish and apistogramma can live together. Both are fine at 75–77°F. Plan on at least 20 gal.

KillifishKillifish70–77°F · pH 5.5–7 ApistogrammaApistogramma75–84°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–77°Killifish 70–77°Apistogramma 75–84°
The green band is the temperature range both can live in.
456789Both: 5.5–7Killifish 5.5–7Apistogramma 5–7
The green band is the pH both tolerate.

Size to scale

Killifish · 2.5 inApistogramma · 3 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

KillifishApistogramma
Temperature70–77 °F75–84 °F
pH5.5–75–7
Adult size2.5 in3.0 in
Minimum tank10 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atTopBottom
GroupAlone or in pairsAlone or in pairs
DietCarnivoreCarnivore

Better tank mates for killifish

All killifish tank mates

Better tank mates for apistogramma

All apistogramma tank mates

Questions

Can killifish live with apistogramma?

Yes, killifish and apistogramma can live together. Both are fine at 75–77°F. Plan on at least 20 gal.

What temperature suits both killifish and apistogramma?

75–77 °F. Killifish need 70–77 °F, apistogramma need 75–84 °F.

What size tank do killifish and apistogramma need together?

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