Angelfish vs Oscar Fish

Side-by-side care comparison to help you choose.

AngelfishOscar Fish
DifficultyIntermediateAdvanced
Adult size6 inches10-12 inches
Lifespan10-15 years10-15 years
Min tank size29 gallons75 gallons
Water temp76-82°F74-80°F
pH6.5-7.56.0-7.5
Temperamentsemi-aggressiveAggressive and territorial
Tank matesLarger tetras, corydoras, gouramis; avoid fin-nippers and small shrimp.Large, robust cichlids or catfish; avoid small fish.
DietOmnivorous: high-quality flake or pellet, supplemented with frozen or live foods like brine shrimp, bloodworms, and vegetable matter once or twice daily.Omnivorous; high-quality pellets supplemented with live/frozen foods like earthworms, shrimp, and krill; feed once or twice daily.