Can killifish live with zebra plecos?

Verdict
No

No. Killifish and zebra plecos should not share a tank. No shared temperature. Killifish need 70–77°F, zebra plecos need 79–88°F.

KillifishKillifish70–77°F · pH 5.5–7 Zebra plecoZebra pleco79–88°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Killifish 70–77°Zebra pleco 79–88°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Killifish 5.5–7Zebra pleco 6–7.5
The green band is the pH both tolerate.

Size to scale

Killifish · 2.5 inZebra pleco · 3.5 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

KillifishZebra pleco
Temperature70–77 °F79–88 °F
pH5.5–76–7.5
Adult size2.5 in3.5 in
Minimum tank10 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupAlone or in pairsAlone or in pairs
DietCarnivoreCarnivore

Better tank mates for killifish

All killifish tank mates

Better tank mates for zebra plecos

All zebra pleco tank mates

Questions

Can killifish live with zebra plecos?

No. Killifish and zebra plecos should not share a tank. No shared temperature. Killifish need 70–77°F, zebra plecos need 79–88°F.

What temperature suits both killifish and zebra plecos?

None. Killifish need 70–77 °F and zebra plecos need 79–88 °F, so the ranges do not meet.

What size tank do killifish and zebra plecos need together?

At least 30 gal, set by the zebra pleco. Add space for each extra fish.