Swamp of the Lost Monster A disappearing body leads a detective and his sidekick into an encounter with a gill man. Details Casts Galleries Posters Title Swamp of the Lost Monster Release Date 1957-09-05 Runtime 01 Hours 20 Minutes Genres Western Horror Mystery Production Companies Alameda Films Production Countries Mexico Gastón Santos... Gastón... Rayo de Plata... Gastón's Horse... Manola Saavedra... Julieta... Pedro de Aguillón... Espergencio... Manuel Dondé... Don Nacho Mendoza... Sara Cabrera... Doña María... Original Size (1280x720) Original Size (801x1202) Original Size (500x750) Original Size (960x1440) Original Size (500x750)