The Silence of the Marsh (Spanish: El Silencio del pantano, also known as The Swamp's Silence) is a 2019 Spanish mystery thriller web film written and directed by Marc Vigil. The film stars Pedro Alonso, Àlex Monner and Carmina Barrios in the lead roles. The plot of the film is based on a novel written by Juanjo Braulio and the story revolves around a journalist turned crime novelist who also commits crime. The film originally premiered at the 2019 Seville European Film Festival. It was theatrically released in Spain on 1 January 2020. The Silence of the Marsh was made available for streaming on Netflix on 22 April 2020 and opened to mixed reviews from critics.