A different dolphin feeding technique caught on video... This feeding technique is similar to mud ring feeding in the sense that the dolphin is disturbing sand or sediment to aid in the capture of its prey, but different in every other way. The mud ring technique involves a dolphin creating a ring of mud or sand around a group of fish in shallow water. The fish feel trapped in the ring and the dolphin either catches them in the ring, or other dolphins catch the fish when they jump out of the wat