Oceanic islands are landforms that rise from the ocean floor, typically formed by volcanic activity or coral reef development. They are often located in the open ocean, far from continental landmasses. These islands can vary in size and shape, and they are usually surrounded by deep water. Many oceanic islands are home to unique ecosystems and species that have adapted to their isolated environments. Examples include the Galápagos Islands, known for their diverse wildlife, and Hawaii, which features a variety of volcanic landscapes. These islands play a crucial role in biodiversity and are often studied for their ecological significance.