Overview
The Hatchetfish (Common) (Gasteropelecus sternicla) is a intermediate freshwater species known for its silver coloration. Can glide above water. Surface.
Origin & Appearance
Origin: South America.
Colors: Silver.
Body Shape: Compressiform (laterally flat). Typical adult dimensions: 6.0 x 0.9 x 3.3.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 75–82°F |
| pH Range | 5.5–7 |
| Water Hardness (GH) | 2-10 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Surface |
Behavior & Activity
Surface hoverer; holds position just below waterline; can leap/glide above water surface using pectoral muscles
Speed: 45/100Aggression: 1/10diurnalSchooling (6+)
Breeding
Difficult; surface egg scatterer
Common Diseases
💊 Ich
Expert Notes
Can glide above water; needs tight lid