Can Oscar live with Royal Pleco?

Not recommended

Why

Side-by-side

OscarRoyal Pleco
Temperature74–81°F73–82°F
pH6–86.5–7.5
Hardness (GH)5–20 dGH4–12 dGH
Adult size16"17"
TemperamentAggressivePeaceful
Min tank75 gal120 gal

Together, plan on at least 120 gallons.

Compatible alternatives

Instead of Oscar (to keep Royal Pleco):

Instead of Royal Pleco (to keep Oscar):

Design the whole tank, not just the stocking

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Everything compatible with Oscar · …with Royal Pleco

Related pairings

Oscar + Neon TetraOscar + Cherry ShrimpOscar + AngelfishOscar + Nerite SnailOscar + Amano ShrimpOscar + Harlequin Rasbora