Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now.   Click the Techie Toolbox for tips and help to make the most of your time on the Web. Chapter 29: Sponges, Cnidarians, Flatworms, and Roundworms Aquatic Resources Division, The Marine Resources Center, Marine Biological Laboratory, Woods Hole, MA Visit this site to view photographs and for taxonomic information on sponges. What is the scientific name for the organ-pipe sponge? Wonders of the Seas: Cnidarians: Simple but Deadly Animals! What are the two different forms of a Cnidarian body? What is a nematocyst? What is a Scyphozoan? Follow the link above to answer these questions about cnidaria. Flatworms Flatworms are the least complex worms. Read the information at this site to learn more about flatworm habitats, how they move, reproduction, and how and what they eat.