Aurelia aurita Linnaeus, 1758
English: Moon jellyfish in the Pairi Daiza aquarium in Belgium.
Because of the lighting, the organism in shown in false colour.
Français : Méduse aurélie à l'aquarium du parc pairi daiza (Belgique)
Date 2010 (23 May 2010, according to Exif data)
Source Own http://work www.lucnix.be
Author Luc Viatour
Source: https://commons.wikimedia.org/wiki/File:Aurelia_aurita_(Cnidaria)_Luc_Viatour.jpg

The common jellyfish, moon jellyfish, moon jelly, or saucer jelly (Aurelia aurita) is a widely studied species of the genus Aurelia. The moon jellyfish is translucent and can be recognized by its four horseshoe-shaped gonads, easily seen through the top of the bell. Aurelia aurita is found along the eastern Atlantic coast of Northern Europe and the western Atlantic coast of North America.