The Park has one of the most diverse ecosystems of the country, made up of two archipelagos, coastal lagoons, coral reefs, water channels and mangrove swamps. The mangrove swamps are of vital importance since they are home to a great many aquatic, amphibian and land organisms; they play a major role in the protection of coastline from erosion and they are habitat and nesting site for many marine birds. Similarly, the coral reefs make up one of the most beautiful and diverse ecosystems but also one of the most fragile. A countless many creatures move around the corals or take refuge in their nooks and crannies. Other ecosystems include dry tropical forest, sedimentary floors, wetlands, rocky shores, sandy beaches, seagrass beds and coastal lagoons.