Gymnotiformes is an order of fish commonly known as knifefish, primarily found in freshwater habitats of South America. They are characterized by their elongated bodies and lack of dorsal fins, which gives them a unique, knife-like appearance. These fish are known for their ability to generate electric fields, which they use for navigation, communication, and hunting. Members of the Gymnotiformes order include various species, such as the Electric Eel and the Black Ghost Knifefish. They typically inhabit rivers, lakes, and swamps, where they can be found in both shallow and deep waters. Their electric organs allow them to detect prey and avoid predators in murky environments.