What do hatchetfish look like?

Hatchetfish are characterized by their unique body shape, which resembles a hatchet or axe. They have a flat and elongated body with a narrow head, and their fins are located at the front and back of their bodies. Their dorsal fin, or the fin on their back, is particularly large and triangular in shape, giving them their characteristic hatchet-like appearance.

The colouration of hatchetfish can vary depending on the species, but they are typically silvery, with some species having iridescent scales. Some species may have transparent or translucent bodies, allowing you to see their internal organs. Additionally, some species of hatchetfish have bioluminescent organs that produce light, which they use for communication and attracting prey.

Hatchetfish are generally small in size, with some species reaching a maximum length of only a few inches. They are typically found in freshwater habitats in various parts of the world, particularly in South America and Africa. These fish have adapted to life in low light environments, and they often inhabit the lower levels of rivers and streams where sunlight does not penetrate deeply.