Ragworms are segmented worms with long, flattened bodies, consisting of many segments. Each segment has a pair of parapods, or swimming legs. These parapods are covered with bristles called chaete and are used for crawling and swimming, these structures are clearly shown in this image. Ragworms are found predominantly in muddy shorelines and often used as fishing bait. They can live up to 3 years. Some species are considered an active predator, sifting through the mud and sand for small ocean creatures, others exist as scavengers.
Anne Weston, Francis Crick Institute