SpongeBob SquarePants first aired on Nickelodeon in 1999, created by marine biologist Stephen Hillenburg, and its end-credits music has accompanied the show ever since. The jaunty closing theme became familiar to a generation who grew up watching SpongeBob, Patrick and Squidward in Bikini Bottom. Online, creators reuse the 33-second clip as a ready-made outro for videos, streams and compilations, often alongside other SpongeBob clips like the SpongeBob sad song, because listeners recognise it instantly as a lighthearted ending rather than a new joke.