Possible, but with meaningful cautions
Both species can defend the same part of the aquarium, increasing territorial pressure.
Practical response: Provide extra footprint, sight breaks and backup separation options.
Angelfish
- Adult size
- 15 cm / 5.9 in
- Tank reference
- 150+ L / 39.6+ US gal
- Group
- 1+
- Zone
- mid
- Temperature
- 24–30°C / 75.2–86°F
Oscar
- Adult size
- 35 cm / 13.8 in
- Tank reference
- 280+ L / 74+ US gal
- Group
- 1+
- Zone
- mid
- Temperature
- 23–28°C / 73.4–82.4°F
Water parameter overlap
Behavior and space
Tall-bodied cichlids that need vertical room and may prey on very small fish as they mature. A large predatory cichlid with heavy waste production and substantial space requirements.
A compatibility answer should also consider the actual tank dimensions, number of each fish, filtration, planting and other occupants. Two species can be reasonable together in a long, structured aquarium yet become a poor pairing when compressed into a small footprint.
Common questions
Can Angelfish live with Oscar?
The StockingLab verdict is caution: Both species can defend the same part of the aquarium, increasing territorial pressure.
Do their temperatures overlap?
24–28°C / 75.2–82.4°F shared range.
Should I trust compatibility calculators completely?
No. Individual behavior, sex ratios, breeding condition, aquascape and tank size can change the outcome. Use the result to identify risks, then verify care requirements before purchase.