Moon Jelly

Scientific Name: Aurelia labiata
Range: Worldwide
Habitat: Coastal waters
Diet: Small fish and plankton
Size: Up to 1 foot in diameter (12 in) 
Fun Fact: They use four, long, mucus lined oral arms and thin tentacles with stinging cells to catch and hold onto prey. Unlike other jellies, moon jelly stings are too weak to affect humans. 
IUCN Conservation Status: Not endangered