Can Corydoras Catfish live with Oscar?
🟡 CAUTION
Case-by-case. Watch group sizes, tank size, and feeding zones.
Corydoras Catfish
Corydoras aeneus
| Adult Size: | 2.8" |
| Temperament: | peaceful |
| Min Tank: | 20 gal |
| Temperature: | 72-78°F |
| pH Range: | 6.0-7.5 |
Oscar
Astronotus ocellatus
| Adult Size: | 12.0" |
| Temperament: | aggressive |
| Min Tank: | 75 gal |
| Temperature: | 74-81°F |
| pH Range: | 6.0-7.5 |
Water Parameter Overlap
| Parameter | Corydoras Catfish | Oscar | Overlap |
|---|---|---|---|
| Temperature | 72-78°F | 74-81°F | 4°F ✓ |
| pH | 6.0-7.5 | 6.0-7.5 | 1.5 ✓ |
Why CAUTION?
Temperament Match: peaceful + aggressive. One aggressive → predation/nipping risk.
⚠️ Size Predation Risk: Corydoras Catfish (2.8") vs Oscar (12.0"). Large size difference → larger fish may eat smaller fish.
Score: 55.0/100 (CAUTION threshold: GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 20+ gallons:
API Bottom Feeder Pellets — $8.99
Sinking pellets for corydoras
Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding.