Can rams live with fancy goldfish?

Verdict
No

No. Rams and fancy goldfish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); rams need 80–86°F. No temperature suits both.

German blue ramGerman blue ram80–86°F · pH 5–7 Fancy goldfishFancy goldfish65–74°F · pH 7–8

What to watch

Water side by side

55°60°65°70°75°80°85°90°German blue ram 80–86°Fancy goldfish 65–74°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 7German blue ram 5–7Fancy goldfish 7–8
The green band is the pH both tolerate.

Size to scale

German blue ram · 2.5 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

German blue ramFancy goldfish
Temperature80–86 °F65–74 °F
pH5–77–8
Adult size2.5 in6.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomAll levels
GroupAlone or in pairsAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for rams

All german blue ram tank mates

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Questions

Can rams live with fancy goldfish?

No. Rams and fancy goldfish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); rams need 80–86°F. No temperature suits both.

What temperature suits both rams and fancy goldfish?

None. Rams need 80–86 °F and fancy goldfish need 65–74 °F, so the ranges do not meet.

What size tank do rams and fancy goldfish need together?

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