When someone is called a jelly fish, an array of imageries are instantly conjured-of a weakling, physically incompetent easily broken psychologically and emotionally. One who is vanquished by the slightest opposition. Jelly-fish is a jelly-like amphibious creature of the Cnidarian family. They don't have brain or sophisticated sense organ such as eye or ears but that does not mean jelly-fish is totally helpless. Though small in size as it is (about 10 inches, 25cm in diameter) it isn't perpetually vulnerable. A specie of jelly-fish, box jelly-fish can actually kill a human being in a matter of minutes by releasing powerful toxin.
Your subjects might appear foolish whom you could ride for your selfish ends. Like the Jelly fish they might appear weak and helpless to your power and tactics but not for too long will they remain jellies for Allah watches all proceedings.
"O Allah! Lord of power (and Rule), You give power to whom. You please; and You strippest off Power from whom You please" (Q3:26)