What is lagoon definition?

A lagoon is a shallow body of water that is separated from a larger body of water by a natural barrier, such as a sandbank, coral reef, or barrier island. Lagoons are usually saltwater, but some may be freshwater. They can be found along coastlines, in estuaries or deltas, and in coral reef ecosystems. Lagoons have unique ecological characteristics because they are transitional zones between land and sea, providing habitats for a variety of plant and animal species. They are also important for human activities such as fishing, tourism, and recreation. Lagoons can range in size from a few hectares to many thousands of square kilometers.