AquaStocker

Can a Goldfish (Fancy) Live With a Oscar?

Not recommended — a goldfish (fancy) and oscar are a risky mix.

Updated June 2026
By the AquaStocker team · How we source our data
Not recommended
Goldfish (Fancy)Goldfish (Fancy)
8.0" · 20g min · 65–75°F · Peaceful
+
OscarOscar
12.0" · 55g min · 74–81°F · Aggressive
Temperatures line up — both thrive around 74–75°F.
pH preferences overlap (7–8) — easy to keep both comfortable.
The oscar is aggressive and will likely harass or harm the goldfish (fancy).
Plan on at least 55 gallons for the pair (the larger of their two minimums).

Plan the full tank with the stocking calculator →

Gear for a community tank

As an Amazon Associate we earn from qualifying purchases.

Aquarium water test kitwatch your parametersAquarium filtermore filtration = headroomAquarium heaterstable temperature55 gallon aquariumroom for both

FAQ

Can a goldfish (fancy) and oscar live together?
Not recommended — a goldfish (fancy) and oscar are a risky mix. Minimum tank for the pair is about 55 gallons.

Related

Can a Betta Live With a Neon Tetra?Can a Betta Live With a Guppy?Can a Betta Live With a Goldfish (Fancy)?Can a Betta Live With a Angelfish?Can a Betta Live With a Molly?Can a Betta Live With a Platy?