Crab on Bacterial Mat (image) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Caption This is a crab on a bacterial mat at mud volcano Mound 12, documented by a deep-sea observatory. Credit GEOMAR Helmholtz Centre for Ocean Research Kiel Usage Restrictions GEOMAR has to be credited. 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.