Current theories suggest that they reside in the oxygen minimum zone because of its cornucopia of detritus and marine snow, and that the worms produce clouds of mucous to capture particles of food and " snow, " which they later draw into their mouths and ingest . " C . pugaporcinus " has been found to feed mainly on pelagic phytoplankton, as well as pelagic foraminiferans, silicoflagellates, dinoflagellates, and marine protists.
