Jellyfish is a Legends of Idleon monster: 8 drops.

Jellyfish | Idleon Toolbox

Jellyfish

Have_a_stack_of_exactly_6000_Jellyfish_in_your_Storage_Chest._I_heard_their_Jelly_goes_good_with_burgers_btw.

Jellyfish_Jelly

Jellyfish_Card

Paper_Boat

Increases your Total Defence by 30%. Golden foods are never consumed

Golden_Meat_Pie

Hold down on this item to turn 10 Fragments into 1 Talent Point Reset Potion. You'll need 1 open inventory space for this to work.

Talent_Point_Reset_Fragment

Hold down to add a Silver Pen to your Post-Office! You can use it to skip a Delivery!

Silver_Pen

Bugsack_Stamp

Drag onto any Equip to apply. Success Chance; 100% Uses up 1 slots only if Successful. WARNING:Mystery Stat has a chance to be Negative, and reduce stats!