Abstract:Skeletanema belongs to Diatoms and can cause Harmful Algal Bloom. Two strains Skeletanema. come from two seas, the East China Sea and Jiaozhou Bay. By light microscope and scanning electronic microscope two strains were identified as Skeletanema costaum.It is found that two strains are different in strutted processes length, cell interval, cell colony feature, number of the cells on the cell colony and number of chromatoplast under light microscope. The cells of Skeletanema costaum cultured with different ...