<i>Arapaima gigas</i> Scale Deformation (VIDEO) Cell Press This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption This is a movie showing the various plastic deformation mechanisms that retard crack propagation in moist arapaima fish scales, imaged under increasing load in real time using scanning electron microscopy during an in situ fracture toughness test in the scanning electron microscopy. Credit Wen Wang Usage Restrictions Credit Required. 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.