Common Hatchetfish (Gasteropelecus sternicla)
| Common Hatchetfish Gasteropelecus sternicla | |
|---|---|
 | |
| Name | Common Hatchetfish |
| Name Lat. | Gasteropelecus sternicla |
| Family | Freshwater Hatchetfishes |
| Family lat. | Gasteropelecidae |
| Order | Characins |
| Order lat. | Characiformes |
| Origin | South America |
| Habitat | Tributaries, forest streams |
| Diet | Carnivore |
| pH | 5.5-7.5 |
| Behavior | Peaceful |
| Keeping | Group |
| Care Level | Moderate |
| Reproduction | Egg scatterer |
| Breeding | None reported |
| Life Span | 3-5 years |
| Protection | No |
| Metric Units | |
| Size | 5-7 cm |
| Temperature | 20-28 °C |
| Hardness | 1-15 °dH |
| Aquarium | 100 cm / 200 l |
| US Units | |
| Size | 2"-2.8" |
| Temperature | 68-82 °F |
| Hardness | 18-267 ppm |
| Aquarium | 50 gal |
Distribution and habitat
River hatchetfishes are widely distributed in herbaceous waters of Peru, Venezuela, Brazil, Guyana and Suriname. They live in loose schools in slow-flowing forest streams and small rivers, preferably in places with rich vegetation on the water surface.
Maintenance
The aquarium should have plants flooding to the water surface, stones and roots, as well as floating plants that serve as hiding places and dim the light. The soft, slightly acidic water should have a weak current. A gapless cover is necessary, because the jumpy animals can jump.
No ammonia, ammonium and nitrite should be detectable, the nitrate value should not exceed 100 mg/l. To ensure the water quality and oxygen content, a filter and heater adapted to the aquarium size is required, as well as lighting for the species-appropriate day-night rhythm of the animals.
Diet
They prefer to eat food from the water surface. The food supply consists of small insects such as mosquitoes, aphids, fruit and fruit flies, plus cyclops, daphnia and mosquito larvae, which are also well accepted freeze-dried or frozen. After habituation, high-quality dry food (flakes, granules) is also accepted.
A regular and varied diet promotes health and increases resistance. Only as much should be fed as is eaten immediately (in a maximum of 10 minutes).
Behaviour and compatibility
They are peaceful, somewhat shy fish and can be kept very well in a community tank with other peaceful and calm fish. At least 5, but better more River Hatchetfish should be kept together.
Basically, only mutually compatible fish species with similar demands on water conditions and water temperature should be socialized.
Sex dimorphism
The sexes can only be identified by the spawning of the female.
Reproduction and breeding
There are no known reports of successful breeding in the aquarium.
Important
The river hatchetfish (Gasteropelecus sternicla) is often confused with the silver hatchetfish (Gasteropelecus levis).
They have powerful pectoral fin muscles that enable them to take off quickly from the water when fleeing and, propelled by rapid strokes of the caudal fin, they can fly up to 3 m (10 ft)
The well-being of the fish should be monitored regularly. Temperature should be checked daily, pH, hardness and nitrate levels should be checked at least every 14 days. Regular partial water changes are recommended, even if the contaminant level has not yet reached the upper limit. Sudden changes in water quality should be avoided. Newly introduced fish must be accustomed slowly to the water in the aquarium.
Further literature can be found in your pet store.
References
Text: petdata; Image: petdata
Source: BMELV (1998): Tierschutzgutachten - Haltung von Zierfischen (Süßwasser); RIEHL & BAENSCH (2006): Aquarien Atlas Bd. 1, Mergus Verlag; ENGELMANN (2005): Zootierhaltung - Tiere in menschlicher Obhut: Fische, Verlag Harri Deutsch
- Gemäß § 21 Abs. 5 Tierschutzgesetz idgF