In connection with a sharp decrease in the level of the Aral Sea, degradation of the aquatic ecosystems of the Southern Aral Sea is taking place. The increase in water salinity, its pollution with toxic substances, unstable oxygen content, insta-bility of the temperature regime and many other factors have led to a decrease in the number of aquatic organisms, includ-ing fish and forage invertebrates, as well as birds associated with the aquatic environment. All this, in turn, negatively affects the circulation of parasites in nature. Changes in the natural environment of the region make it relevant to revise the fauna of ichthyoparasites.