The Little Mermaid

Act I
Prince Eric, his adviser Grimsby, and sailors are aboard a ship at sea, discussing the "mythical" merfolk that supposedly live under the sea. Grimsby tries to tell Eric that he must return to court to fulfill his birthright as king. However, Eric hears a beautiful voice and commands it to be followed ("Fathoms Below").
Deep on the ocean floor in the merfolk's kingdom, a concert in honor of a defeated coup d'état by Ursula is underway, being performed by the daughters of Triton the sea king. King Triton's court composer, Sebastian has composed a song for girls to perform ("Daughters of Triton"). However, the youngest daughter, Ariel, is not there for her solo, bringing the concert to a grinding halt. Ariel has forgotten about the concert entirely, and is swimming around the surface, admiring her new-found item, a fork. She reveals that she is fascinated with the human world ("The World Above"). Together with her best friend Flounder, Ariel visits Scuttle and his fellow seagulls to ask about the human things she's collected, and he explains them somewhat erroneously ("Human Stuff").
Elsewhere, the sea witch Ursula is planning revenge against her brother, King Triton. She explains that she was banished from the palace because she used black magic, and tells her minions Flotsam and Jetsam to keep an eye on Ariel, whom she thinks will be the key to getting the crown and trident ("I Want the Good Times Back").
When Ariel returns to the underwater kingdom, she is berated by King Triton, who is angered to learn that she has been on the surface as contact between the merfolk and human world is forbidden. Ariel rushes off, upset, and King Triton assigns Sebastian, of whom Ariel made a laughingstock because of her absence at the concert, to watch over Ariel and make sure she doesn't get into any trouble. Ariel sits alone in her grotto, which contains her collection of human things, and sings about how she does not believe humans are so bad ("Part of Your World")....