Can Jack Dempsey Live With Marbled Hatchetfish?
Jack Dempsey and Marbled Hatchetfish are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 75–82°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.0.
Size
✗ Not Compatible
Extreme size difference. Jack Dempsey (10") may eat or bully Marbled Hatchetfish (1.5").
Temperament
✗ Not Compatible
Jack Dempsey (aggressive) is not compatible with Marbled Hatchetfish (peaceful). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Jack Dempsey: middle, Marbled Hatchetfish: top), reducing conflict.
Trait Conflict
✗ Not Compatible
Jack Dempsey is a predator and may eat Marbled Hatchetfish.
Important Notes
- Marbled Hatchetfish is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 63 gallons
| Parameter | Jack Dempsey | Marbled Hatchetfish |
|---|---|---|
| Temperature | 72–86°F | 75–82°F |
| pH | 6.5–7.5 | 5–7 |
| Max Size | 10" | 1.5" |
| Temperament | Aggressive | Peaceful |
| Swim Level | Middle | Top |
| Min Tank | 55 gal | 15 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.