Marine worms are recognized world champions in biodiversity. This book is the first photo guide to these secretive and often strange animals. The book is based on photographs taken by the author, as well as his friends – citizen scientists and professional marine biologists. It is designed for the general public interested in marine life. The book is also of interest to scuba divers and underwater photographers interested in identifying their underwater finds. This photo guide should also assist marine biologists and students in the initial identification of collected marine worms. The book covers the region from the Red Sea, East and South Africa to Hawaii, Marshall Islands and Guam.