The Mosasaurus was introduced to film audiences in Jurassic World in 2015 as the park's giant marine reptile, shown leaping from its lagoon during the feeding show. Its roar was created as a layered movie sound effect rather than a real animal recording, since mosasaurs are extinct. Clips of the lagoon scenes spread widely on video platforms, and editors began lifting the roar on its own for dinosaur edits, creature jumpscares and reaction videos. It remains popular because few movie roars convey the same mix of size, water and sudden attack.