Can Least Killifish Live With Severum?
Least Killifish and Severum are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 75–80°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
✗ Not Compatible
Extreme size difference. Severum (8") may eat or bully Least Killifish (1").
Temperament
⚠ Use Caution
Least Killifish (peaceful) may have issues with Severum (semi-aggressive). Monitor closely if attempting.
Swim Level
✓ Compatible
Fish occupy different water levels (Least Killifish: top, Severum: middle), reducing conflict.
Important Notes
- Least Killifish is a schooling fish and needs at least 4 of its kind.
Tank Requirements
Minimum tank size for this combination: 55 gallons
| Parameter | Least Killifish | Severum |
|---|---|---|
| Temperature | 66–80°F | 75–84°F |
| pH | 6.5–8 | 6–7.5 |
| Max Size | 1" | 8" |
| Temperament | Peaceful | Semi-aggressive |
| Swim Level | Top | Middle |
| Min Tank | 5 gal | 55 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.