The extended freshwater life of Petromyzontiformes larvae (ammocoetes) takes place mainly in lotic waters where it has been studied in detail. Information on ammocoetes in lentic habitats is extremely limited. with few data on the occurrence of specimens in ponds or large lakes. The area of the Smolenskoye Poozerye National Park has a dense network of lakes and rivers. https://www.halohealthcarers.shop/product-category/oral-care/