Аннотация:World tendency in partial substitution of fishmeal-based diet in feeding fish reared in aquaculture systems for plant proteins is caused by exhaustion of fishery resources. The use of products of fat-free soy processing in feeds has provoked troubles in salmonid health, in particular the onset of inflammation in the intestine. Numerous investigations devoted to the analysis of reasons for such negative consequences have attracted attention to the intestinal microbiota of fish. In this review, we analyze the studies on the effect of soy proteins in feed on the intestinal microbiota of salmonids.