Based on the data from 3 oceanographic censuses in the Xinghua Bay in January 2009, April and September 2008, the author discussed the spatial-temporal distribution of number of involved in. Results showed that 123 species were identified among which 47 species occurred in . The number of Perciformes species occupied in January, April and September separately ′ in individual number were 2.84, 2.42 and 2.42 among which seasonal weight H′ was highest in winter. The individual April were both key factors affecting on individualJanuary to April, 82.41% from were decided by diverse marine topography and runoff in west part of the bay, mixture of tidal waters in the middle bay as well as