The Jellion Clones are the clones of the Jellyfish and the entire population of Bikini Bottom. They appeared in Planet of the Jellyfish. They were created by the Jellion King. The cloned jellyfish have the power to clone anything in their desire. The jellyfish don't sting with their tentacles. In the episode, they failed to clone Sandy and SpongeBob since they fought back by using mayonnaise to kill them off. When killed, they become green smile.
The clones' only difference from the characters they cloned were their eyes which were a dark black color, similar to a trilobite's eyes. Their voices have a robotic sound to them.