As an eight-year-old boy, Allen Bauer (David Kreps) is vacationing with his family near Cape Cod. While taking a sight-seeing tour on a small boat, he gazes into the ocean and sees something below the surface that fascinates him, while his older brother Freddie Bauer is walking around the boat fascinated by the women. Allen jumps into the water, even though he cannot swim. He grasps the hands of a girl who is inexplicably under the water with him and an instant connection forms between the two. Allen can now breathe under water as he is in the hands of a mermaid. However, Allen is pulled to the surface by the deck hands and the two are separated, though apparently no one else sees the girl. After the ferry moves off, Allen looks back at the girl, who dives underwater showing her mermaid's tail. Allen comes to believe the encounter was a near-death hallucination, but his bond with the mermaid proves so strong that his subsequent relationships with women fail as he seeks the connection he felt with the mermaid.
When gymnastics school teacher Caroline goes on holiday at her family's home in Cornwall, she meets her distant mermaid relative Miranda, who looks exactly like her. She agrees to let Miranda trade places with her, while she goes on a bicycling trip with a friend. Caroline feigns an accident which leaves her confined to a wheelchair for a few weeks and gets nurse Carey to attend to Miranda. This conceals the fact that Miranda has a fish tail instead of legs.
La sirène Ondine vit avec ses sœurs Aquarella et Mélusine et son père, le roi de la mer, sur le fond marin. Mais Ondine ne veut plus peigner ses cheveux d'or, car elle est fascinée par la vie sur terre. Un jour, elle sauve la vie du Prince Nicolas et tombe amoureuse de lui. Le prince, cependant, est inconscient et est rapidement trouvé par une jeune fille, qui s'avérerait être la princesse Anne-Line. Ondine s'enfuit et se cache derrière un rocher à son arrivée. Nicolas et Anne-Line tombent immédiatement amoureux sous l'œil jaloux d'Ondine, mais Anne-Line disparaît quand elle voit approcher des gens, tout comme Ondine.
King Triton and his wife, Queen Athena, rule over the underwater kingdom of Atlantica, which is filled with music and laughter. They have seven young daughters, the youngest of whom is Ariel. The merfolk are shown relaxing in a lagoon above water, and Triton gives Athena a music box. Suddenly, a pirate ship approaches. Everyone escapes except Athena, who is crushed by the ship when she tries to save the music box. Devastated by the death of his wife, Triton throws the music box away and bans music from the kingdom.
Les bulles et les algues à la surface de l'océan donnent naissance à des bébés d'eau, de petites sirènes. Elles jouent à la surface jusqu'à ce qu'elles entendent passer une fanfare, annonçant l'arrivée d'un cirque composé d'animaux marins. Le cirque comprend entre autres des clowns et un escargot-girafe.
Un homme dresse des poissons à sauter de son chapeau rempli d'eau jusqu'à un aquarium, puis en sort des lapins. L'aquarium enfin grandit, pour laisser apparaître au fond une sirène, qui finit par léviter. La sirène devient ensuite une femme normale, l'homme fait apparaître un lit ouvragé puis se change en Neptune, assis sur un trône.
The film is about Ravi Chandra (Venkatesh), the film's hero and Sagara Kanya (Shilpa Shetty), a mermaid. Malashree plays Ganga, Ravi's cousin who loves him. They stay with some comedians in a house near the seashore. Kaikala Satyanarayana, the villain of the film, tries to acquire a ship which drowned with a lot of treasure on board.
In the opening scene, a young boy named Chi is on a boat with his mother and her boyfriend. He falls overboard and almost drowns because he cannot swim. However he ends up on a beach, and claims that he was rescued by a "big fish".
It is early in the 19th century. The thirteen-year-old Hans Christian Andersen (called "Chris" for short; portrayed and voiced by Paul O'Keefe) is known in his native village of Odense, Denmark, as an incurable daydreamer. Actually, the boy's reveries are an escape from the hardships of his family's life.
Skeeter Bronson (Adam Sandler) is a hotel handyman who was promised by his father, Marty Bronson (Jonathan Pryce), to be the manager of the family hotel. A mysophobe named Barry Nottingham (Richard Griffiths) agreed to keep that promise when the Bronson family sold their hotel to him—then built a new hotel instead. Thirty years later, when the story begins, Skeeter is the hotel's handyman while management is held by Kendall (Guy Pearce). Barry's new hotel, the Sunny Vista Nottingham Hotel, is a hit, but he's got plans to build an even more elaborate hotel, one designed around a theme that he's keeping secret.
Cody Griffin is an adopted teenager; his birth mother is a mermaid who left him on the Griffins' boat when he was a baby to avoid being captured. As she left, she was spotted by Mr. Wheatly, a fisherman who became obsessed with finding mermaids. Cody establishes himself as a quick swimmer in the town he lives in, and has a girlfriend named Sam. He's under a lot of pressure from a big swim meet coming up and because he's failing biology, he's partnered with Jess Wheatly, the class geek who is a marine biology expert.
Jack Carlisle is a disillusioned 13-year-old boy. His mother is always away at work since his father left. He decides to run away, as he feels his mom won't miss him. As he is ready to leave, his nanny convinces him to read a 'magic book' that belongs to her. The book is about a pirate adventure on Magic Island. As Jack reads the book, he is sucked into the world and goes on numerous adventures with Prince Morgan, while fleeing the evil Blackbeard the Pirate. He is even saved by Lily, a beautiful mermaid, whom he falls in love with. Lily is given the power to turn into a human and accompanies Jack on his adventure. Along the way, Jack encounters sand sharks, a tree that grows the favorite food of the person who climbs it, and a cursed temple full of treasure. Jack also uses items he brought along with him in his "magic" bag to stop the pirates. Eventually Jack is able to return home. He wakes up to his loving mother, and finds that his jeans are now torn and frayed and the flag on Prince Morgan's ship has transformed into his bag—signs that his adventure may have actually happened.
Sabrina travels to Australia's Great Barrier Reef with Gwen, a fellow witch from England, for a week-long vacation where they try to help protect a hidden mermaid colony whose habitat is threatened by ocean pollution, and by local marine biologist Dr. Julian Martin, who is determined to find the colony as his claim to fame. While Sabrina finds a friendship with Barnaby, a "merman" from the mermaid colony, Salem the cat finds a possible romance with another witch-turned-into-a-cat named Hilary, but finds Sabrina's problems interfering with his plans. In order to prevent Julian from launching a search for the mermaid colony, she casts a spell to create a storm to keep him in port, which succeeds except that a lightning bolt knocks Sabrina unconscious, and when she comes to she learns she has lost her powers, at least temporarily.