- Duke the Whale agreeing to take Marina to the surface.
- Fritz saving Marina from the polyps.
- All of her sisters cut off their hair in exchange for a knife that can save their little sister.
- Marina refusing to kill the man she loves and dying with dignity.
- Sebastian's line during Ariel's first night at Prince Eric's place:
Sebastian: You are hopeless, child. You know that? Completely hopeless.
- The wedding scene at the end, where everyone's happy and Ariel is saying goodbye to her dad.
Ariel: I love you, Daddy.
- The moment where Eric bows to Triton and he nods back to him in approval.
- And when Eric takes off in a rowboat with a harpoon to rescue Ariel from Ursula, starting off his Moment Of Awesome:
Eric: I lost her once, I'm NOT going to lose her again!
- Later on in the scene:
Ariel: Eric, you've got to get away from here!
Eric: No, I won't leave you!
- Later on in the scene:
- Grimsby advising Eric on his feelings for Ariel. He may be a Stiff Upper Lip, but he turns to the prince and gives him wonderfully heartwarming advice on love. And it would have worked too, if not for Ursula's magic.
Grimsby: If I may say so Eric, far better than any dream girl, is one warm, and caring... and right before your eyes.
- Triton's realization about Ariel's feelings.
Triton: She really does love him, doesn't she, Sebastian?
Sebastian: Mm-hm. It's like I always say, your majesty, "children gotta be free to lead their own life".
Triton: You always say that?
[Sebastian laughs nervously and shrugs]
Triton: Well, I suppose there's only one problem.
Sebastian: What's that, your majesty?
Triton: (sadly) How much I'm going to miss her.
[Sebastian looks on in confusion by that statement]
- Flounder presenting Ariel with the statue of Eric in her grotto. Her reaction seals it.
- The musical's "If Only (Quartet)" is this for Sebastian, as it illustrates a level of love and concern for Ariel that wasn't touched upon much in the film. In particular, we have lines like this:
"I'd give my life up to make it happen..."
- It also shows how much Triton regrets how he's treated Ariel and never truly been able to understand her, despite his best efforts.
- Eric teaching Ariel to dance to express her feelings in the stage version's number "One Step Closer". Highlighted even further when Ariel tentatively dances for him at the ceremony where he's meant to choose a bride. He has a Love Epiphany, claiming to have understood every word she said in her dance, then declares that he loves Ariel, even though he didn't see it before, and proposes to her on the spot.
- Eric has a ton of these in the musical; his main song, "Her Voice" is a beautiful love ballad wherein he states his determination to find the girl with the beautiful voice who saved his life. And all he knows is that she has a beautiful voice.
Eric: And her voice
Is sweet as angels sighing
And her voice
As warm as summer skies
And that sound
It haunts my dreams and spins me 'round
Until it seems I'm flying...
- From the second film, when Ariel and Flounder are reunited after not seeing each other for years.
- At the end of the second film, Triton gives Melody the choice of coming to live with him under the sea (forever). Or staying with her parents on the surface. She instead offers up a third option.
- "In Harmony" from "The Evil Manta" is one of the most heartwarming things ever.
- When the Manta is trying to brainwash Flounder into hating Ariel, Flounder knows what he's doing but pretends to go along with it. The Manta leaves, Ariel catches up to Flounder and is all worried that he's no longer her friend, only for Flounder to drop the act and reassure her that he didn't buy the Manta's words for a second. Then this leads to a flashback of how Ariel and Flounder first met and became friends.