Hatchetfish

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fast facts

About Hatchetfish

Aquarium Size
Small, Medium
Difficulty Of Care
Weekly
Group
Freshwater
Size
Small
Suitable Tank Mates
Other Hatchetfish; Corydoras, Tetras, Catfish, Dwarf Cichlids, Gouramis
Swimming Region
Upper
Temperament
Community
Fish Water Condition
Warm, Soft, Slightly Acidic Water
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Hatchetfish General Description

Freshwater hatchetfish are a type of ray-finned fishes belonging to the family Gasteropelecidae. These fish are divided into three genera with a total of nine different species with the Common Hatchetfish (Gasteropelecus sternicla) being the most common. In general, they are peaceful schooling fish that can be kept in community tanks with other community species. Though these fish can get along with other peaceful species, males of the same species sometimes have trouble getting along.

Freshwater hatchetfish are a type of ray-finned fishes belonging to the family Gasteropelecidae.

Origins

All freshwater hatchetfish come from South America and Panama where they tend to inhabit the upper level of the water column, swimming just below the surface.

Color

Hatchetfish are named for the unique, hatchet-like shape of their bodies – these fish also have large pectoral fins which enable them to jump out of the water to catch insects. Different species exhibit different colorations with colors ranging from black, gray, silver and brown to brighter colors like red, orange, and green. Several species have a striped or marbled pattern.

Maintenance and Care

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Hatchetfish are a moderately hardy group of fishes that is best for experienced or intermediate-level aquarium hobbyists. Though these fish can adapt to a range of water conditions, they are highly susceptible to Ich and they have a tendency to jump so they need a covered tank. These fish come from a tropical or semi-tropical environment so they require a tank temperature in the 72°F to 82°F range with a pH between 5.5 and 7.5 and a water hardness in the 2 to 15 dGH range. In terms of habitat, these fish prefer clean water with some floating plants but plenty of room to swim at the surface of the water.

This is a moderately hardy group of fishes that is best for experienced or intermediate-level aquarium hobbyists.

Feeding

Freshwater hatchetfish are carnivores by nature, feeding on insects and crustaceans in their natural habitat. These fish are particularly well adapted to eating small insects from the surface of the water since their mouths are located on the top of their bodies. In the home aquarium, they should be fed a diet of carnivore flakes, pellets or granules as well as live and frozen foods.

Also read:Fast-Growing Aquarium Plants for Planted Tanks

Breeding Info

There are very few physical differences between male and female, so sexing these fish is difficult. They are egg layers but some species like the Common Hatchetfish are very difficult to breed in the home aquarium. The Marbled Hatchetfish, on the other hand, breeds quite readily in the home aquarium.

Aquarium Varieties

There are nine species of freshwater hatchetfish from three genera: Carnegiella, Gasteropelecus, and Thoracocharax.

    Photo credit: chonlasub woravichan/Shutterstock; Besjunior/Shutterstock

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