The Peanut Worms are Mrs. Puff's pets. They only appeared in the episode "Growth Spout." They were all in Mrs. Puff's vegetable garden. They looked like big peanuts, so Mr. Krabs tried to steal them from Mrs. Puff's garden because he wants to give food to Pearl, who was having her growth spurt and was getting even hungrier by everything she eats. They squirt out gooey liquid as a form of self-defense.