Doliolids are tiny marine animals so transparent they are practically invisible. Yet, these rarely seen and little understood organisms are a major driver of the marine ecosystem on continental shelves around the world. University of Georgia researcher Marc Frischer recently completed a major field study in the South Atlantic Bight on the continental shelf off the coast of Georgia in an effort to understand these mysterious animals. The study, funded by the U.S. National Science Foundation, involved 25 research cruises over a two-and-a-half-year period.