Erin Dillon on Shark Denticles (VIDEO) Smithsonian Tropical Research Institute This video is under embargo. Please login to access this video. Caption Based on microscopic shark scales found on fossil- and modern coral reefs in Caribbean Panama, Smithsonian scientists reveal the changing roles of sharks during the last 7000 years, both before and after sharks in this region were hunted. Erin Dillon explains how dermal denticles reveal how reef communities have changed, providing context for reef conservation. Credit STRI Usage Restrictions Credit: STRI 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.