Multiple <i>Cassiopea</i> jellyfish (IMAGE) California Institute of Technology Caption Multiple Cassiopea jellyfish. The animals prefer to sit upside down on the floor of the water column. Credit Caltech Usage Restrictions with image credit 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.