The Monster That Challenged the World (aka The Jagged Edge and The Kraken) is a 1957 science-fiction monster movie, about an army of giant mollusks that emerge from California's Salton Sea. Directed by Arnold Laven, the film starred Tim Holt and Audrey Dalton.The Monster That Challenged the World was produced by Gramercy Pictures (not related to the former PolyGram division) and released by United Artists.