An Artist Illustration of a Narwhal (IMAGE) Cell Press Caption Danish researchers have sequenced the genome of a narwhal and show that the species has extremely low levels of genetic diversity. Credit Binia De Cahsan Usage Restrictions Credit Required. License Licensed 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.