Catostylus Jellyfish (IMAGE) CSIRO Australia Caption The numbers of jellyfish, like this Catostylus, appear to be on the increase due to a combination of pollution, overfishing and climate change. Credit Image credit – Lisa Gershwin, Reef HQ Usage Restrictions Please credit: Lisa Gershwin, Reef HQ 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.