The study was carried out in 5 islands (Truong Sa, Sinh Ton, Thuyen Chai, Da Dong and Da Tay) of Truong Sa archipelago from 25/12/2007 to 15/01/2008. A total of 114 samples of phytoplankton, zooplankton and zoobenthos were collected in 22 stations. Samples were fixed in the 4% for...