Can Angelfish live with Betta Fish?
🟡 CAUTION
Case-by-case. Watch group sizes, tank size, and feeding zones.
Angelfish
Pterophyllum scalare
| Adult Size: | 5.9" |
| Temperament: | semi-aggressive |
| Min Tank: | 40 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.5-7.5 |
Betta Fish
Betta splendens
| Adult Size: | 2.8" |
| Temperament: | semi-aggressive |
| Min Tank: | 5 gal |
| Temperature: | 75-80°F |
| pH Range: | 6.5-7.5 |
Water Parameter Overlap
| Parameter | Angelfish | Betta Fish | Overlap |
|---|---|---|---|
| Temperature | 75-82°F | 75-80°F | 5°F ✓ |
| pH | 6.5-7.5 | 6.5-7.5 | 1.0 ✓ |
Why CAUTION?
Temperament Match: semi-aggressive + semi-aggressive. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Angelfish (5.9") vs Betta Fish (2.8"). Large size difference → larger fish may eat smaller fish.
Score: 50.0/100 (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 40+ gallons:
Fluval Flex Aquarium Kit — $149.99
57-gallon kit suitable for angelfish
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.