A Biofluorescent Chain Catshar (VIDEO) Cell Press This video is under embargo. Please login to access this video. Caption This movie shows a Biofluorescent Chain Catshark (Scyliorhinus retifer). Credit David Gruber 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.