sentences:  The book follows an ensemble of protagonists who are investigating what at first appear to be freak events related to the world's oceans.The book has several sub-plots and will occasionally follow minor unrelated characters to illustrate how events unfold around the globe.Sigur Johanson, a marine biologist working at the Norwegian University of Science and Technology, is asked to analyze a new species of marine worms, superficially related to Hesiocaeca methanicola.