Baby Shark is based on a long-running children's song that existed in different forms before the modern viral version. The best-known recording online came from Pinkfong, whose animated Baby Shark video was released in 2015 and later exploded worldwide through YouTube, children's playlists and social media. Its simple melody and repetitive lyrics made it easy to parody, remix and reuse in short meme clips. That mix of recognisability and playful annoyance is why it still appears in reaction edits and joke videos years later.