👉 Nematistius is a type of fish that is commonly found in freshwater systems, particularly lakes and rivers. These fish are known for their distinctive appearance, with a long, thin body covered in dark scales and a white belly. They have been used by humans as a source of food and medicine due to their high nutritional value. Nematistius can be classified into two main species: the common or common carp (Cyprinus carpio) and the common carp with a yellow belly (
