"Sea Symphony" is a choral symphony composed by Ralph Vaughan Williams in 1910. It is based on texts from Walt Whitman's "Leaves of Grass," celebrating the themes of nature and the sea. The work is structured in five movements, combining orchestral and choral elements to create a rich, immersive experience. The symphony is notable for its expansive orchestration and the use of a large choir, which enhances the emotional depth of the music. It reflects Vaughan Williams' fascination with the sea and its connection to the human experience, making it a significant piece in the choral repertoire.