SpongeBob SquarePants is an American animated television series created by Stephen Hillenburg that premiered on Nickelodeon in 1999, and its opening theme has become one of the most recognisable tunes in children's television. The song introduces the show's undersea world and cheerful tone before each episode, and decades of reruns, films and online clips have kept it familiar to new generations. On social media it is frequently reused as shorthand for silliness, nostalgia or a sudden shift into cartoon logic, which explains why the short theme remains popular long after its first broadcast.