Can fancy goldfish live with paradise fish?

Verdict
No

No. Fancy goldfish and paradise fish should not share a tank. Paradise fish nip fins, and the long fins of fancy goldfish are an easy target.

Fancy goldfishFancy goldfish65–74°F · pH 7–8 Paradise fishParadise fish61–79°F · pH 6–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 65–74°Fancy goldfish 65–74°Paradise fish 61–79°
The green band is the temperature range both can live in.
456789Both: 7–8Fancy goldfish 7–8Paradise fish 6–8
The green band is the pH both tolerate.

Size to scale

Fancy goldfish · 6 inParadise fish · 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

Fancy goldfishParadise fish
Temperature65–74 °F61–79 °F
pH7–86–8
Adult size6.0 in3.5 in
Minimum tank30 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atAll levelsTop
GroupAlone or in pairsOne per tank
DietOmnivoreOmnivore

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Better tank mates for paradise fish

All paradise fish tank mates

Questions

Can fancy goldfish live with paradise fish?

No. Fancy goldfish and paradise fish should not share a tank. Paradise fish nip fins, and the long fins of fancy goldfish are an easy target.

What temperature suits both fancy goldfish and paradise fish?

65–74 °F. Fancy goldfish need 65–74 °F, paradise fish need 61–79 °F.

What size tank do fancy goldfish and paradise fish need together?

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