Can Common Goldfish and Oscar live together?

Common Goldfish and Oscar are not compatible. The comparison on this page runs the same compatibility engine as the tank builder, checking temperature and pH overlap, predation by size, temperament, and known hard-pair conflicts.

Species Comparison

Common Goldfish vs Oscar

Verdict:Not compatible

Side-by-side specs

Goldfish

Family

Cichlids

14″

Adult size

13″

75gal

Min tank

75gal

60–72°F

Temperature

74–81°F

6.5–8

6–7.5

peaceful

Temperament

aggressive

Solitary

Schooling

Solitary

All

Water level

mid

Compatibility notes

criticalCommon Goldfish (60–72°F) and Oscar (74–81°F) need different temperatures.
criticalCommon Goldfish produces heavy waste and needs cool water — Oscar won't tolerate sharing a tank.

Try both in the builder →Compare different species