The ecosystem most commonly found in Coastal Plains is wetlands.

These regions, which include marshes, swamps, and estuaries, are distinguished by the seasonal or year-round presence of water. A wide variety of plant and animal species can be found in wetlands, flourishing in the nutrient-rich habitat. They are essential for flood prevention, water filtration, and the provision of habitat for migratory and aquatic animals. Wetlands, which are found along coastlines, act as a buffer between the land and the sea, lessening the impact of storms. They are an essential component of coastal ecosystems worldwide because of their significance in preserving ecological equilibrium.