Porcupine Fish Jaw (IMAGE) Smithsonian Tropical Research Institute 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 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.