Dive in the cenotes (IMAGE) Goethe University Frankfurt Caption The researchers collect the underwater crab Xibalbanus tulumensis, which only occurs here. Credit Björn M. von Reumont, Goethe University Frankfurt Usage Restrictions To be used only when reporting on Goethe University Frankfurt. Indicated copyright: Björn M. von Reumont 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.