Can goldfish live with bichirs?

Verdict
No

No. Goldfish and bichirs should not share a tank. Goldfish are coldwater animals (60–74°F); bichirs need 72–82°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°Goldfish 60–74°Bichir 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Goldfish 7–8Bichir 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Goldfish · 10 inBichir · 12 in0"2"4"6"8"10"12"
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

GoldfishBichir
Temperature60–74 °F72–82 °F
pH7–86.5–7.5
Adult size10.0 in12.0 in
Minimum tank40 gal75 gal
TemperamentPeacefulSemi-aggressive
Swims atAll levelsBottom
GroupAlone or in pairsAlone or in pairs
DietOmnivoreCarnivore

Better tank mates for goldfish

All goldfish tank mates

Better tank mates for bichirs

All bichir tank mates

Questions

Can goldfish live with bichirs?

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

What temperature suits both goldfish and bichirs?

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

What size tank do goldfish and bichirs need together?

At least 75 gal, set by the bichir. Add space for each extra fish.