Biological floc is farmed by aerobic microorganisms in water as the main organisms and inorganic agglomerates formed by biological flocculation , by bacteria , plankton and organic debris and some inorganic substances mutual flocculation com -ponents.Based on the development of bio -floc studies, the structural features of floc, the flocculation mechanism, the factors af-fecting the biological and floc technology applications in aquaculture exist were reviewed ,which has some significance for floc tech-nology to...