Chain catshark (Scyliorhinus retifer) (IMAGE) Marine Biological Laboratory Caption The chain catshark (Scyliorhinus retifer) is one of four elasmobranch species (sharks, skates, rays and sawfish) known to be biofluorescent. Credit: Jakob Wikström and Etty Bachar-Wikström Credit Jakob Wikström and Etty Bachar-Wikström Usage Restrictions Use with credit License Original 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.