Ariel, a sixteen-year-old mermaid princess, is dissatisfied with life under the sea and curious about the human world. With her best fish friend Flounder, Ariel collects human artifacts and goes to the surface of the ocean to visit Scuttle the seagull, who offers inaccurate and comical knowledge of human cultures. Ignoring the warnings of her father (King Triton) and the court musician (Sebastian the crab) that contact between merpeople and humans is forbidden, Ariel still longs to be part of the human world; to this end she has filled a secret grotto with all the human artifacts she has found.
Ariel and Flounder travel to the surface to watch a celebration for the birthday of Prince Eric, with whom Ariel falls in love. The birthday celebration is cut short by a massive storm, during which the ship is struck by lightning. Everyone manages to escape in a lifeboat, except for Eric who boards the burning ship to save his dog, Max. Eric almost drowns but is saved by Ariel, who drags him to the beach. She sings to him, but when he stirs awake, she dives underwater. Eric has a vague impression that he was rescued by a girl with a beautiful voice; he vows to find her, and Ariel vows to find a way to join Eric. Triton and his daughters notice a change in Ariel, who is openly lovesick. Triton questions Sebastian about Ariel's behavior, during which Sebastian accidentally reveals the incident with Eric. Triton furiously confronts and punishes Ariel in her grotto, using his trident to destroy her collection of human treasures, including her prized statue of Prince Eric. After Triton leaves, a pair of eels, Flotsam and Jetsam, convince a crying Ariel that she must visit Ursula the sea witch, who can supposedly make all her dreams come true. Ursula makes a deal with Ariel to transform her into a human for three days. Within these three days, Ariel must receive the "kiss of true love" from Eric; otherwise she will transform back into a mermaid on the third day and belong to Ursula. As payment for legs, Ariel has to give up her voice, which Ursula magically traps in a shell she wears as a locket. Ariel's tail is transformed into legs and she is dragged to the surface by Sebastian and Flounder.
On the beach, Scuttle helps dress Ariel in the remains of sail. She is found by Eric, but when he learns that she cannot speak, he discards the notion that she is the one who saved his life. He helps her to the palace, where the servants think of her as a survivor of a shipwreck. Ariel spends time with Eric, and at the end of the second day, they almost kiss but are thwarted by Flotsam and Jetsam. Angered at the close call, Ursula takes the disguise of a beautiful young woman named "Vanessa" and appears onshore singing with Ariel's voice. Eric recognizes the song, and Vanessa casts a hypnotic spell of enchantment on Eric to make him forget about Ariel. The next day, Ariel finds out that Eric will be married to Vanessa on a ship. She cries and is left behind when the wedding barge departs. Scuttle discovers Vanessa's true identity and informs Ariel. Ariel and Flounder chase the wedding barge, Sebastian informs Triton, and Scuttle is assigned to "stall the wedding." With the help of various animals, the nautilus shell around Ursula's neck is broken, restoring Ariel's voice back to Ariel and breaking Ursula's enchantment over Eric. Realizing that Ariel was the girl who saved his life, Eric rushes to kiss her, but the sun sets and Ariel transforms back into a mermaid. Ursula reverts back to her true form and she kidnaps Ariel. Triton appears and confronts Ursula, but cannot destroy the contract Ursula made with Ariel. Triton chooses to sacrifice himself for his daughter and signs the contract. Ursula transforms Triton into a polyp. Ursula takes Triton's crown and trident and declares herself queen of the oceans, which was her plan from the beginning. Eric dives into the sea and throws a harpoon at Ursula. In her rage, she attempts to destroy him by using the trident, but Ariel attacks her, and Ursula accidentally kills Flotsam and Jetsam. Angered, Ursula subsequently transforms into gigantic proportions and stirs up a storm using the magical trident. A whirlpool is also formed, which disturbs several shipwrecks, one of which Eric later commandeers. Just as Ursula is set to use the trident to destroy Ariel, Eric turns the wheel hard to port, in effect ramming the ship's splintered bowsprit through Ursula's abdomen, distracting her long enough for the trident's power to backfire and destroy her in a huge explosion. With Ursula gone, her power breaks and the polyps in Ursula's garden (including Triton) turn back into merpeople. Later, after seeing that Ariel really loves Eric, Triton willingly changes her from a mermaid into a human using his trident. She runs into Eric's arms, and the two finally kiss. Ariel marries Eric in a wedding where both humans and merpeople attend.
Review: Who doesn't love this deep-sea adventure? It's like you're swimming in Atlantica yourself the colors are so real and I love the bubbles...could you imagine having to hand draw all the bubbles in this film??? Anyways, the Disney animated department was on the brink of closing, working out of trailers in a vacant lot when someone thought up this idea...but why hadn't it been done before? Well, in the original story the mermaid dies at the end and there's no happy ending, not a Disney type of movie...so with a little editing and cuts, you have a wonderful adventure with awesome music, "Under the Sea" and "Kiss the Girl", are two great examples...however how can such a great movie, with a creative concept, cause Disney to almost take it out of theaters and never release it to VHS (At the time)? Because people are fucking sue happy and I'm sorry if this takes offense to anyone, but African Americans tried framing this a racist movie that demolishes their ancestry...anybody seen this movie...can you tell me what part of the movie I'm talking about...I can!!! Let me recite some of the lyrics from "Under the Sea" sung by the Jamican Sebastian..."The seaweed is always greener, in somebody else's lake, you dream about going up there, but that is a big mistake. Just look at the world around you, right here on the ocean floor, such wonderful things around you, what more is you looking for? Under the Sea, Under the Sea, down where it's better, down where it's wetter take it from me...Up on the shore they work all day, out in the sun they slave away..." And that folks, was what people took offense too and almost caused this beloved classic to never exist, the nerve of some people taking the magic away like that!!!