Overview
The Common Hatchetfish is a slender and active fish that adds a striking contrast with its metallic silver color and bright yellow-tipped caudal fin. It requires a spacious tank and can be a good choice for beginners, although it is quite active and may be a bit nippy with other fish.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Gasteropelecidae |
| Genus | Gasteropelecus |
| Species | Gasteropelecus sternicla |
| Water type | freshwater |
Natural Habitat
Native to the Amazon and Orinoco river basins in South America, these fish thrive in slow-moving, weedy waters.
Appearance
These fish are known for their distinctively flattened body, with a sharp downturned lower jaw giving them a hatchet-like appearance.
Behavior
The Common Hatchetfish is curious and active, often darting in and out of plants. It is best kept in a group, but may be nippy with more aggressive tankmates.
| Trait | Value |
|---|---|
| Temperament | active and curious |
| Schooling | No |
| Activity level | high |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 23–26°C (73–79°F) | Use a reliable adjustable heater |
| pH | 6.5–7.5 | Avoid sudden swings |
| Hardness (GH) | 5-15 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <20 ppm | Manage through regular partial water changes |
| Min. tank | 50L (13 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- They can reach a length of up to 6 inches.
- The silver coloration reflects the light, helping to camouflage them from predators.
- Males have a more pointed snout than females.
📋 Full Care Guide
Ready to set up a tank for your Common Hatchetfish? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read Common Hatchetfish Care Guide →Related Species
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.