The species Aurelia aurita is found in the North, Black, Baltic and Caspian Seas, Northeast Atlantic, Greenland, northeastern USA and Canada, Northwest Pacific and South America.

Furthermore, bell contract rate, which indicates moon jellyfish feeding activity, remains constant although DO concentrations are lower than normal.

[8] During July and August, it is observed that moon jellyfish aggregations of 250 individuals consumed an estimated 100% of the mesozooplankton biomass in the Seto Inland Sea.

[9] Other major fish predators that are also present in these coastal waters do not seem to show the same high tolerance to low DO concentrations that the moon jellyfish exhibit.

Low DO concentrations in coastal waters such as Tokyo Bay in Japan and the Seto Inland Sea prove to be advantageous for the moon jellyfish in terms of feeding, growth, and survival.

Little is known about the requirements for particular vitamins and minerals, but due to the presence of some digestive enzymes, we can deduce in general that A. aurita can process carbohydrates, proteins, and lipids.

[10] Aurelia does not have respiratory parts such as gills, lungs, or trachea; it respires by diffusing oxygen from water through the thin membrane covering its body.

[6] A 2015 study has found that A. aurita are capable of life cycle reversal where individuals grow younger instead of older, akin to the "immortal jellyfish" Turritopsis dohrnii.

[15] There has been a study presenting that Aurelia's body system is not significantly affected by artificial materials like microbeads, which can be found in cosmetic and personal care products.

[16] Aurelia aurita have high proportions of polyunsaturated fatty acids compared to other prey types and are a source of vital nutrients for predators.

While the main cause remains unknown, it is believed that they are consumed by one of three potential predatory filter-feeding sessile organisms: mussels, ascidians, and barnacles.

In the wild, the warm water at the end of summer combines with exhaustive daily reproduction and lower natural levels of food for tissue repair, leaving these jellyfish more susceptible to bacterial and other disease problems that likely lead to the demise of most individuals.