The film was announced in the trades as "The Monster from Beneath the Sea". During preproduction in 1951, Ray Harryhausen brought to Dietz and Chester's attention that Ray Bradbury had just published a short story in "The Saturday Evening Post" titled "The Beast from 20,000 Fathoms" (it was later anthologized under the title "The Fog Horn"). This story was about a marine-based prehistoric dinosaur that destroys a lighthouse. A similar sequence appeared in the draft script of "The Monster from Beneath the Sea". The producers, wishing to share in Bradbury's reputation and popularity, promptly bought the rights to his story and changed the film's title to match the story's title. Bradbury's name was used extensively in the promotional campaign. It also had an on-screen credit that read "Suggested by the Saturday Evening Post Story by Ray Bradbury".