Can fancy goldfish live with dwarf gouramis?

Verdict
No

No. Fancy goldfish and dwarf gouramis should not share a tank. Fancy goldfish are coldwater animals (65–74°F); dwarf gouramis need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

Fancy goldfishFancy goldfish65–74°F · pH 7–8 Dwarf gouramiDwarf gourami72–82°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–74°Fancy goldfish 65–74°Dwarf gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Fancy goldfish 7–8Dwarf gourami 6–7.5
The green band is the pH both tolerate.

Size to scale

Fancy goldfish · 6 inDwarf gourami · 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

Fancy goldfishDwarf gourami
Temperature65–74 °F72–82 °F
pH7–86–7.5
Adult size6.0 in3.0 in
Minimum tank30 gal10 gal
TemperamentPeacefulPeaceful
Swims atAll levelsTop
GroupAlone or in pairsAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Better tank mates for dwarf gouramis

All dwarf gourami tank mates

Questions

Can fancy goldfish live with dwarf gouramis?

No. Fancy goldfish and dwarf gouramis should not share a tank. Fancy goldfish are coldwater animals (65–74°F); dwarf gouramis need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

What temperature suits both fancy goldfish and dwarf gouramis?

72–74 °F. Fancy goldfish need 65–74 °F, dwarf gouramis need 72–82 °F.

What size tank do fancy goldfish and dwarf gouramis need together?

At least 30 gal, set by the fancy goldfish. Add space for each extra fish.