Polychaetes are segmented worms that live in nearly all marine habitats

Many species of these worms—and there are at least eleven thousand five hundred species worldwide—perform ecological functions similar to those of earthworms, their terrestrial relatives. They provide food for birds or fish, they recycle marine compost, and their burrowing keeps sand oxygenated. Hosted on Acast. See acast.com/privacy for more information.