Can yoyo loaches live with killifish?

Verdict
Yes

Yes, yoyo loaches and killifish can live together. Both are fine at 75–77°F. Plan on at least 40 gal.

Yoyo loachYoyo loach75–86°F · pH 6–7.5 KillifishKillifish70–77°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–77°Yoyo loach 75–86°Killifish 70–77°
The green band is the temperature range both can live in.
456789Both: 6–7Yoyo loach 6–7.5Killifish 5.5–7
The green band is the pH both tolerate.

Size to scale

Yoyo loach · 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

Yoyo loachKillifish
Temperature75–86 °F70–77 °F
pH6–7.55.5–7
Adult size5.0 in2.5 in
Minimum tank40 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomTop
GroupGroups of 5+Alone or in pairs
DietOmnivoreCarnivore

Better tank mates for yoyo loaches

All yoyo loach tank mates

Better tank mates for killifish

All killifish tank mates

Questions

Can yoyo loaches live with killifish?

Yes, yoyo loaches and killifish can live together. Both are fine at 75–77°F. Plan on at least 40 gal.

What temperature suits both yoyo loaches and killifish?

75–77 °F. Yoyo loaches need 75–86 °F, killifish need 70–77 °F.

What size tank do yoyo loaches and killifish need together?

At least 40 gal, set by the yoyo loach. Add space for each extra fish.