Giant Shark Tooth (IMAGE) Smithsonian Tropical Research Institute Caption Most of the giant shark teeth found in Panama's Gatun Formation were from neonates or juveniles, leading researchers to propose that this was a nursery site. Credit Catalina Pimiento Usage Restrictions Credit: Catalina Pimiento 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.