Character
Jeffrey the Jellyfish first appears in the episode, "I'm Your Biggest Fanatic."
Description
Jeffrey is a large mascot suit of a pink jellyfish. Instead of normal stingers, he has legs and knees, as shown when they are bent over while Patrick carries him away in a little wagon. His expression seems to change depending on the situation.
History
I'm Your Biggest Fanatic
Patrick chases him to touch him. At the end of the episode, Patrick has him tied up in a wagon.
Tutor Sauce
He appears in the background at the arcade that SpongeBob and Mr. Krabs go to to teach SpongeBob how to drive.