Objective] The aim was to analyze community structure and biodiversity of fish in Dongting Lake.[Method] Fish resources in Dongting Lake was investigated, fish species, fish biomass, dominant species and diversity were analyzed.[Result] The results showed that the number of fish species in all areas of Dongting Lake were not quite different , and the largest biomass was carp.The dominant fish species in Dongting Lake were Cyprinidae, Bagridae, Serranidae, Cobitidae.The variation range of the Shannon-Wiener (H1 ) index of the Dongting Lake fish ...