 As these worms have shown no ability to swim or otherwise propel themselves through the water, and have no long, protruding appendages to catch prey with, they must rely on filter feeding to survive.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.