Can Blue Devil Damselfish Live With Emerald Crab?
Blue Devil Damselfish and Emerald Crab are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 74–82°F.
pH
✓ Compatible
Good pH overlap at 8.0–8.4.
Size
✓ Compatible
Compatible sizes (3" and 2").
Temperament
✗ Not Compatible
Blue Devil Damselfish (aggressive) is not compatible with Emerald Crab (peaceful). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Blue Devil Damselfish: middle, Emerald Crab: bottom), reducing conflict.
Tank Requirements
Minimum tank size for this combination: 25 gallons
| Parameter | Blue Devil Damselfish | Emerald Crab |
|---|---|---|
| Temperature | 74–82°F | 74–82°F |
| pH | 8–8.4 | 8–8.4 |
| Max Size | 3" | 2" |
| Temperament | Aggressive | Peaceful |
| Swim Level | Middle | Bottom |
| Min Tank | 20 gal | 10 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.