SpongeBob SquarePants first aired on Nickelodeon in 1999, created by marine biologist Stephen Hillenburg, and its theme song quickly became one of the most recognisable cartoon intros on television. The song is based on a sea shanty style call-and-response, asking who lives in a pineapple under the sea before naming the cheerful sponge himself. Clips of the intro spread widely on YouTube, TikTok and meme pages, often remixed as goofy ahh edits, and it remains popular because the melody is short, catchy and instantly tied to childhood nostalgia.