Released on her 1981 album Physical, The Promise (The Dolphin Song) stands as a distinctive song in Olivia Newton-John's extensive discography. While the album is widely celebrated for its pop and dance hits, this track offers a softer, more reflective moment within the record. The song draws inspiration from the artist's deep affection for marine life, particularly dolphins, channeling a sense of wonder and environmental consciousness into its composition. It showcases Newton-John's versatility beyond her signature upbeat style, providing a gentle counterpoint to the high-energy tracks that defined the era. The recording remains a cherished piece for fans exploring the breadth of her musical catalog, highlighting her ability to blend personal sentiment with accessible pop melodies.