Can tiger barbs live with fancy goldfish?

Verdict
No

No. Tiger barbs and fancy goldfish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); tiger barbs need 72–81°F. They overlap only at 72–74°F, the edge of both ranges.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–74°Tiger barb 72–81°Fancy goldfish 65–74°
The green band is the temperature range both can live in.
456789Both: 7–7.5Tiger barb 6–7.5Fancy goldfish 7–8
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 inFancy goldfish · 6 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

Tiger barbFancy goldfish
Temperature72–81 °F65–74 °F
pH6–7.57–8
Adult size3.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleAll levels
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Questions

Can tiger barbs live with fancy goldfish?

No. Tiger barbs and fancy goldfish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); tiger barbs need 72–81°F. They overlap only at 72–74°F, the edge of both ranges.

What temperature suits both tiger barbs and fancy goldfish?

72–74 °F. Tiger barbs need 72–81 °F, fancy goldfish need 65–74 °F.

What size tank do tiger barbs and fancy goldfish need together?

At least 30 gal, set by the tiger barb. Add space for each extra fish.