Can goldfish live with endlers?

Verdict
No

No. Goldfish and endlers should not share a tank. Goldfish are coldwater animals (60–74°F); endlers need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

GoldfishGoldfish60–74°F · pH 7–8 Endler's livebearerEndler's livebearer72–82°F · pH 7–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–74°Goldfish 60–74°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–8Goldfish 7–8Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Goldfish · 10 inEndler's livebearer · 1 in0"2"4"6"8"10"
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

GoldfishEndler's livebearer
Temperature60–74 °F72–82 °F
pH7–87–8
Adult size10.0 in1.0 in
Minimum tank40 gal5 gal
TemperamentPeacefulPeaceful
Swims atAll levelsTop
GroupAlone or in pairsGroups of 3+
DietOmnivoreOmnivore

Better tank mates for goldfish

All goldfish tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can goldfish live with endlers?

No. Goldfish and endlers should not share a tank. Goldfish are coldwater animals (60–74°F); endlers need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

What temperature suits both goldfish and endlers?

72–74 °F. Goldfish need 60–74 °F, endlers need 72–82 °F.

What size tank do goldfish and endlers need together?

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