An estuarine ecosystem is a coastal area where freshwater from rivers and streams meets and mixes with saltwater from the ocean. This unique environment supports a diverse range of plant and animal species, making it one of the most productive ecosystems on Earth. Estuaries serve as crucial habitats for many species, including fish, birds, and invertebrates, and they provide essential resources for both wildlife and humans. Estuaries also play a vital role in filtering pollutants and improving water quality. They act as natural buffers against storms and flooding, protecting coastal communities. Additionally, estuarine ecosystems are important for recreational activities and commercial industries, such as fishing and tourism, contributing to local economies.