• NEW! Alan Menken and the Leading Ladies (1080p, 15:45): Broadway stars Jodi Benson (Ariel), Paige O'Hara (Belle from Beauty and the Beast), Judy Kuhn (Pocahontas' singing voice), Lillias White (Muse from Hercules), and Donna Murphy (Mother Gothel from Tangled) discuss their animated film collaborations with Alan Menken. Discussions cover acting styles, animating the characters based on the voice actors, and working with Menken and Howard Ashman on the films. This supplement also includes live performance excerpts from their most famous songs.
• NEW! Classic Bonus Previews (1080p, 1:09): A highlight reel promoting additional extra content.
• Audio Commentary: Writers/Directors Ron Clements and John Musker and composer Alan Menken.
• Howard's Lecture (1080p, 16:27)
• Under the Scene: The Art of Live Action Reference (1080p, 13:13).
• Deleted Character: Harold the Merman (1080p, 2:05).
• Part of Your World" Music Video featuring Dcapella (1080p, 3:01)
• #Treasuresuntold (1080p, 5:40): Coop and Cami Ask the World actors Olivia Sanabia and Ruby Rose Turner reveal some little known facts about the movie.
• NEW! Stories From Walt's Office: Gadgets and Gizmos (1080p, 6:01): This supplement takes viewers inside Walt Disney's office and explores his various collectibles -- mostly miniatures -- that people gave to him after discovering he collected them. It also explores some of the ones he made himself.
• NEW! "What I Want From You Is...Your Voice" (1080p, 5:47): The voice actors who portrayed Sebastian, Scuttle, Urusla, and Ariel discuss their characters, rehearse their lines, and share their stories from working on the film. Also available digitally.

• "Part of Your World" - A Look Back (HD, 5:50): Alan Menken and Jodi Benson discuss the impact of "Part of Your World:" nearly cutting the song from the film and its legacy. They also discuss the film's impact on Disney animation.

• Fathoms Below - Alternate Version
• Act V: A Mermaid Sings: Listed as Treasures Untold: The Making of the Little Mermaid on the Diamond Blu-ray.
• Act IV: Setting Sail: Listed as Treasures Untold: The Making of the Little Mermaid on the Diamond Blu-ray.
• Act III: Broadway Comes to Burbank: Listed as Treasures Untold: The Making of the Little Mermaid on the Diamond Blu-ray.
• Act II: A Symphony of Talent
• Act I: Renaissance Men: Listed as Treasures Untold: The Making of the Little Mermaid on the Diamond Blu-ray.
• "Kiss the Girl": Listed under "Crab-E-Oke Sing-Along" on the Diamond Blu-ray.
• "Poor Unfortunate Souls": Listed under "Crab-E-Oke Sing-Along" on the Diamond Blu-ray.
• "Under the Sea": Listed under "Crab-E-Oke Sing-Along" on the Diamond Blu-ray.
• "Poor Unfortunate Souls" Extended"Silence is Golden" Song DemoPrologue: Flower Street: Listed as "Treasures Untold: The Making of the Little Mermaid" on the Diamond Blu-ray.
• Behind "The Ride that Almost Was"Sebastian Lost in the Castle"Les Poissons": Listed under "Crab-E-Oke Sing-Along" on the Diamond Blu-ray.
• Original Theatrical Trailer
• Kiss the Girl Music Video Performed by Ashley Tisdale
• Disneypedia: Life Under the Sea
• Under the Sea Early Presentation Reel
• Ride the Attraction: Listed as Under the Sea Adventure: A Virtual Ride Inspired by Disney Imagineers: Ride the Attraction on the Diamond Blu-ray. This supplement is also available digitally with a commentary track, which was not included on the previous Blu-ray.
• "Part of Your World": Listed under "Crab-E-Oke Sing-Along" on the Diamond Blu-ray.
• Storm Warning: The Little Mermaid Special Effects Unit
• Part of Her World: Jodi Benson's Voyage to New Fantasyland@Disney Animation
• The Little Mermaid - The Story Behind the Story
• Fight with Ursula - Alternate Ending
• Advice from Sebastian
• Backstage with Sebastian

Ariel, a
fun-loving and mischievous mermaid, is off on the adventure of a
lifetime with her best friend, the adorable Flounder, and the
reggae-singing Caribbean crab Sebastian at her side. But it will take
all of her courage and determination to make her dreams come true and
save her father's beloved kingdom from the sneaky sea witch Ursula!