Coastal islands are landforms surrounded by water, typically located near the shore of a larger body of water, such as an ocean or sea. They can vary in size and shape, ranging from small rocky outcrops to large landmasses. Coastal islands often feature unique ecosystems and habitats, supporting diverse wildlife and plant species. These islands can be formed through various geological processes, including volcanic activity, erosion, and sediment deposition. Some well-known examples of coastal islands include the Galápagos Islands, famous for their unique biodiversity, and the Bahamas, known for their beautiful beaches and clear waters.