Coastal water refers to the body of water found near the shores of oceans, seas, and large lakes. This area is characterized by its unique ecosystems, which include estuaries, mangroves, and coral reefs. Coastal waters are influenced by both marine and freshwater sources, making them rich in nutrients and biodiversity. These waters play a crucial role in supporting various marine life, including fish, shellfish, and aquatic plants. They also provide essential services such as fishing, recreation, and tourism. Additionally, coastal waters are vital for protecting shorelines from erosion and serving as habitats for numerous species.