Which of these characters live in a pineapple under the sea in the cartoon "SpongeBob SquarePants".
Explanation
The character who lives in a pineapple under the sea in the cartoon SpongeBob SquarePants is indeed SpongeBob SquarePants himself. He resides in a pineapple located in the fictional underwater city of Bikini Bottom. SpongeBob is an enthusiastic and optimistic sea sponge who works as a fry cook at the local fast food restaurant, the Krusty Krab, and goes on various adventures with his friends in the underwater world.