Hatchet fish

Wedge-bellies or Hatchetfish are members of the Gasteropelecidae (Wedge-bellied) family. As it becomes clear from the names, this group of fish has an unusual body shape – a greatly enlarged and at the same time flattened thoracic region, resembling an ax blade. The pectoral fins are like wings, powered by a group of strong muscles, which account for up to a quarter of the mass of the entire fish. With the help of their “wings”, wedge-bellies are able to glide over the surface of the water, and some species even make small jumps.

In nature, they inhabit the river systems of Central and South America. They are found in small streams and rivers flowing under the canopy of tropical forests, as well as the main channels of large rivers, where they stay near the coastline next to overhanging vegetation and aquatic plants.

Content in home aquariums is sufficient if some features are taken into account. Firstly, it is important for hatchet fish to have a large free space for swimming in the upper layer of water. Secondly, a lid is required to avoid accidental jumping out. Thirdly, it is necessary to use floating feed, food that has sunk to the bottom will be left without attention.