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 32: Echinoderms and Invertebrate Chordates Ocean Animals Sea stars, sun stars, brittle stars, and basket stars all share similar characteristics. Read about the other organisms on this page to determine what characteristics they may share with sea stars. Phylum Chordata This site on invertebrate animals includes a section on chordates. From the table, click on "chordates" at the bottom. What characteristics do lancelets retain all of their lives? Echinodermata: Morphology, UC Museum of Paleontology Follow the link for information about echinoderms, including an SEM image of a sea urchin plate. What are pedicellaria?