Can a Betta Live With a Oscar?
Not recommended — a betta and oscar are a risky mix.
Not recommended
Betta
OscarTemperatures line up — both thrive around 76–81°F.
pH preferences overlap (6.5–7.5) — easy to keep both comfortable.
The oscar is big and predatory enough to eat the betta — likely a meal, not a tankmate.
The oscar is aggressive and will likely harass or harm the betta.
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
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FAQ
Can a betta and oscar live together?
Not recommended — a betta and oscar are a risky mix. Minimum tank for the pair is about 55 gallons.