SpongeBob SquarePants is the protagonist of the American animated television series of the same name. Voiced by Tom Kenny, he is characterized by his optimism and childlike attitude. SpongeBob is commonly seen hanging out with his friend Patrick Star, working at the Krusty Krab, and attending Mrs. Puff's Boating School. SpongeBob was created and designed by Stephen Hillenburg, an artist and marine science educator. The character's name is derived from "Bob the Sponge", the host of Hillenburg's unpublished educational book The Intertidal Zone. He drew the book while teaching marine biology to visitors of the Ocean Institute during the 1980s. Hillenburg began developing a show based on the premise shortly after the 1996 cancellation of Rocko's Modern Life, which Hillenburg directed. SpongeBob's first appearance was in the pilot, "Help Wanted", which premiered on May 1, 1999. SpongeBob SquarePants has become popular among children and adults. The character has garnered a positive response from media critics and is frequently named as one of the greatest cartoon characters of all time. SpongeBob is a good-natured, naive, and enthusiastic sea sponge. In The SpongeBob Musical, his exact species of animal is identified: Aplysina fistularis, a yellow tube sponge that is common in open waters. He resides in the undersea city of Bikini Bottom with other anthropomorphic aquatic creatures. He works as a fry cook at a local fast food restaurant, the Krusty Krab, to which he is obsessively attached, showing devotion to it above other restaurants. His boss is Eugene Krabs, a greedy crab who nonetheless treats SpongeBob like a son. Squidward Tentacles, an octopus, and SpongeBob's ill-tempered, snobbish neighbor, works as the restaurant's cashier. SpongeBob's hobbies include fishing for jellyfish, practicing karate with his friend Sandy Cheeks (a squirrel from Texas), and blowing bubbles. SpongeBob is often seen hanging around with his best friend, starfish Patrick Star, one of his neighbors. SpongeBob lives in a submerged pineapple with his pet snail, Gary.