Can goldfish live with severums?

Verdict
No

No. Goldfish and severums should not share a tank. Goldfish are coldwater animals (60–74°F); severums need 74–84°F. They meet only at 74°F, the edge of both ranges.

What to watch

Water side by side

55°60°65°70°75°80°85°90°Both: 74°Goldfish 60–74°Severum 74–84°
The green band is the temperature range both can live in.
456789Both: 7Goldfish 7–8Severum 6–7
The green band is the pH both tolerate.

Size to scale

Goldfish · 10 inSeverum · 8 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

GoldfishSeverum
Temperature60–74 °F74–84 °F
pH7–86–7
Adult size10.0 in8.0 in
Minimum tank40 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atAll levelsMiddle
GroupAlone or in pairsAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for goldfish

All goldfish tank mates

Better tank mates for severums

All severum tank mates

Questions

Can goldfish live with severums?

No. Goldfish and severums should not share a tank. Goldfish are coldwater animals (60–74°F); severums need 74–84°F. They meet only at 74°F, the edge of both ranges.

What temperature suits both goldfish and severums?

74–74 °F. Goldfish need 60–74 °F, severums need 74–84 °F.

What size tank do goldfish and severums need together?

At least 55 gal, set by the severum. Add space for each extra fish.