The Moon Jellyfish*, (Aurelia labiata), is a species of jellyfish in the Ulmaridae family. Its range is mostly confined to the northern Pacific Ocean, stretching from the west coast of California to the eastern coast of Japan.
This particular species is larger than its relative, Aurelia aurita, but will often swarm in large numbers with them. This species are fed upon by other species of jellyfish, including Phacellophora camtschatica and Cyanea capillata.
*Moon Jellyfish is also used to describe all species of jellyfish in the genus Aurelia.