The most beautiful jellyfish in the world, the moon jellyfish. Some popular jellyfish species famous for their beauty include moon jellyfish, blue plankton, lion hair jellyfish and mushroom jellyfish. JellyFish is an important plankton in the aquatic environment. Its body shape is like a transparent umbrella, the diameter of the umbrella is large or small, and the diameter of the umbrella of the big jellyfish can reach 2 meters.