Porcupine Fish Jaw (image) Smithsonian Tropical Research Institute Share Print E-Mail Caption Based on the comparison of fossil fish jaws, researchers identified three new species of porcupine fish. Credit Aguilera et al. 2017 Usage Restrictions Credit: Aguilera et al. 2017 Share Print E-Mail 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.