Its inherent calmness will provide you with an atmosphere in which answers will erupt like ink from a squid. Large dried ones as sunshades. Dried ones as cheap toilet paper. Wet ones as bottom tissues. Especially nice and cooling in desert areas.
Banana peels replacement for beach pratfalls or in comic acts.
If you put one down on a wooden pier in the summer, it will dry up and disappear without a trace. Put a piece of white paper under it first and a few hours later you have a faint picture of a jellyfish on the paper. Short range self defence weapon. Walk into a room swinging a jellyfish around your head and you'll command respect. Beach protector to keep little sisters away from one's beach possessions.