“…Although many studies have shown that the microbiota in oysters is mainly disturbed and influenced by the external environment [ 30 , 31 ], it is significantly different from the environment. It indicates that the internal environment of oysters has a selective effect on their inner microbial community [ 14 , 32 ]. All these data indicate that oysters have rich, diverse, and unique viral groups that are very different from the viruses found in marine invertebrates so far.…”