ABSTRACT.
In recent years, there has been an increased interest in studying the effect of various biologically active substances in fish feeding. The article describes the experience of using quorum sensing inhibitor in the diet of carp
and its effect on the content of toxic elements in muscle tissue. Vanillin (Sigma-Aldrich, St. Louis, USA) was used as a
quorum inhibitor. The data obtained indicate a positive effect of the drug on reducing a number of toxic elements in the
muscle tissue of fish. There was also an increase in the live weight of experimental animals at the end of the study.
KEYWORDS: quorum sensing inhibitor, vanillin, feeding, aquaculture, carp, toxic elements.