Denticles of Puffadder Shysharks (IMAGE) Heinrich-Heine University Duesseldorf Caption Denticles -- the modified scales -- of a puffadder shyshark seen through an optical microscope (left) and a scanning electron microscope (right) of CO2 exposed sharks denticles. Credit Lutz Auerswald (left) / Jacqueline Dziergwa (right) Usage Restrictions None 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.