Bluntnose Sixgill Shark (IMAGE) University of Washington Caption Teeth from bluntnose sixgill sharks didn't cut as well, but they also didn't dull as quickly as the other teeth. Credit Washington Department of Fish and Wildlife Usage Restrictions Photo 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.