The Xenomorph is the alien creature at the centre of the Alien film series, which began with Alien in 1979, and its hiss has become one of the franchise's most recognisable creature sounds. Across sequels, games and fan edits, the sound has been reused whenever the creature stalks, corners or ambushes its prey, reinforcing its image as a silent, predatory hunter. Online, horror creators and meme editors have adopted it as a quick audio shorthand for unseen danger, which is why it remains popular in short-form videos, reaction clips and Halloween edits decades after the original film.