"Sea of Holes" is an instrumental orchestral piece conducted and composed by The Beatles' producer George Martin for the Yellow Submarine film and was the third track on the orchestral Side 2 of the film's soundtrack album by The Beatles, released in 1969. The song was recorded by a 41-piece orchestra at Abbey Road Studios on 22–23 October 1968. The piece features the sound of a harp being played backwards. This idea first occurred to Martin while arranging the song "Sea of Monsters".[1]
