Drift seeds are seeds that float on ocean currents, allowing them to travel long distances across water. They often originate from tropical or subtropical plants and can be found washed up on beaches around the world. These seeds have adaptations, such as air-filled cavities, that help them stay buoyant and survive in saltwater. When drift seeds reach new shores, they can germinate and grow into new plants, contributing to the spread of plant species. Some well-known examples of drift seeds include the seeds of the coconut palm and mangrove trees, which are capable of thriving in coastal environments.