With growing economic activity in the Kerch Strait, significant hydraulic engineering changes took place, to be more precise, the Crimean bridge as well as the berthing facility of the Taman port were built and put into operation. Not to forget increasing intensity of shipping traffic, new inshore moorings in the Black Sea, transshipment of hazardous dry and liquid cargo through the Strait. It has significantly affected the hydrological and hydrobiological state of the Strait, as well as the aquatic ecosystem. As noted repeatedly, constant monitoring of the strait is essential.