In 2004 this happened in Liaodong Bay in Northeast China and it was noticed that commercial catches of the edible jellyfish Rhopilema esculentum were adversely affected.

[4] These jellyfish largely consisted of Nemopilema nomurai, Aurelia aurita and Cyanea nozakii, and the Institute of Oceanology, Chinese Academy of Sciences is undertaking research into how such blooms develop and their social and ecological effects.

They are linked to variations in sea temperature, increased pollution of coastal waters, overfishing by China, bottom trawling, and the depletion of oxygen levels due to algal blooms.

[5] A number of species of juvenile fish associate with this jellyfish, making use of the protection provided by its stinging tentacles.

[6] Another organism that lives in association with the jellyfish is the stalked barnacle Alepas pacifica which hangs from the margin of the bell.