"Trout Mask Replica" is a double album by the American avant-garde rock band Captain Beefheart and His Magic Band, released in 1969. The album is known for its unconventional structure, blending elements of rock, blues, and free jazz, and features complex rhythms and abstract lyrics. It was produced by Frank Zappa, who played a significant role in shaping its unique sound. The album received mixed reviews upon its release but has since gained a cult following and is considered a landmark in experimental music. Its influence can be seen in various genres, and it is often cited as one of the greatest albums of all time, showcasing the innovative spirit of the late 1960s music scene.