Estuaries are unique coastal areas where freshwater from rivers meets and mixes with saltwater from the ocean. This blending creates a rich environment that supports a variety of plants and animals. Many species, such as fish, birds, and crustaceans, thrive in these habitats, making estuaries vital for biodiversity. These areas also serve important functions for humans. They act as natural filters, improving water quality by trapping pollutants and sediments. Additionally, estuaries provide recreational opportunities and are often used for activities like fishing and boating. Protecting these ecosystems is crucial for both wildlife and communities that depend on them.