Freshwater nano fish are small fish species that are ideal for aquariums with limited space, such as small tanks or bowls. These tiny fish are usually less than two inches in length and come in a variety of colors and patterns. Because of their small size, they are often kept in groups or schools to create a lively and interesting display. Some popular freshwater nano fish include the neon tetra, cherry shrimp, sparkling gourami, pygmy corydoras, and ember tetra. They are low maintenance and easy to care for, making them a great choice for beginners or those with limited time or resources. However, it is important to ensure that the tank is properly set up and maintained to ensure the health and happiness of the fish.