AquaStocker

Can a Swordtail Live With a Oscar?

Not recommended — a swordtail and oscar are a risky mix.

Updated June 2026
By the AquaStocker team · How we source our data
Not recommended
SwordtailSwordtail
5.5" · 20g min · 70–82°F · Peaceful
+
OscarOscar
12.0" · 55g min · 74–81°F · Aggressive
Temperatures line up — both thrive around 74–81°F.
pH preferences overlap (7–8) — easy to keep both comfortable.
The oscar is aggressive and will likely harass or harm the swordtail.
Plan on at least 55 gallons for the pair (the larger of their two minimums).

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

FAQ

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

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