Multiple Cassiopea jellyfish (image) California Institute of Technology Share Print E-Mail 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 Share Print E-Mail 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.