Male narwhal (IMAGE) University of California - Santa Cruz Caption A large male narwhal raises his tusk as he catches his breath before diving in Scoresby Sound. This study recorded the first breathing rates for diving narwhals during quiet periods and in the presence of a seismic ship moving through the fjord. Credit Photo credit, Terrie M. Williams, UCSC. Usage Restrictions For use only with news coverage of this research License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.