Aquatic snails are soft-bodied mollusks that live in water environments, including freshwater, saltwater, and brackish habitats. They have a coiled shell that provides protection and helps them float. These snails play a vital role in the ecosystem by feeding on algae, decaying plant matter, and detritus, which helps maintain water quality. Aquatic snails belong to various families, such as Planorbidae and Lymnaeidae, each with unique characteristics. They breathe through gills or a lung-like structure, depending on their habitat. Many species are also important indicators of environmental health, as their presence can signal changes in water quality.