The scientific name of Macropodus opercularis, also known as fighting fish with fork tail and paradise fish, belongs to Perciformes, Perciformes, Rayidae and Bettinae, and Betta is a freshwater fish. China betta is distributed in the freshwater basins of Guangdong, Guangxi, Fujian and other places in southern China. It is active in shallow water pits or banks with dense aquatic plants. Beautiful appearance and bright color can be used as ornamental fish.