Like most jellyfish, Aurelia aurita, commonly known as the moon jelly has a loose network of nerves called the "nerve net". This is the entire nervous system as the moon jelly doesn't have a central nervous system. The jellyfish detects various stimuli through the nerve net. It is then the nerve net's job to transmit this information around a circular nerve ring, through the rhopalial lappet (small sensory structures located at the rim of the jellyfish's body), and to other nerve cells.