Hans Christian Anderson's Little Mermaid original titled Daughter of the Air had little to do with living under the sea and a lot to do with giving kids a reason to be good.
Below is a summary version of the original little mermaid by Hans Christian Anderson I got this from Wikipedia during some research and I found that this is a great summary. Reading this for me was a reminder me how special and unique the story of the little mermaid is. To fans the little mermaid is the truest symbol of "true Love" even when all was lost and she faced no longer existing her love stayed strong and she wouldn't stop loving her prince. I believe all mermaids hold this truest love in them and that's why so many of us humans love mermaids.
The Little Mermaid dwells in an underwater kingdom with her widowed father (the sea king or Mer-King), her dowager grandmother, and her five older sisters, each of whom had been born one year apart. When a mermaid turns fifteen, she is permitted to swim to the surface for the first time to glimpse the world above, and when the sisters become old enough, each of them visits the upper world one at a time every year. As each returns, the Little Mermaid listens longingly to their various descriptions of the world inhabited by human beings.
When the Little Mermaid's turn comes, she rises up to the surface, watches a birthday celebration being held on a ship in honor of a handsome prince, and falls in love with him from a safe distance. A violent storm hits, sinking the boat, and the Little Mermaid saves the prince from drowning. She delivers him unconscious to the shore near a temple. Here, she waits until a young woman from the temple and her ladies in waiting find him. To her dismay, the prince never sees the Little Mermaid or even realizes that it was she who had originally saved his life.
The Little Mermaid becomes melancholy and asks her grandmother if humans can live forever. The grandmother explains that humans have a much shorter lifespan than a mermaid's 300 years, but that when mermaids die, they turn to sea foam and cease to exist, while humans have an eternal soul that lives on in heaven. The Little Mermaid, longing for the prince and an eternal soul, visits the Sea Witch in a dangerous part of the ocean. The witch willingly helps her by selling her a potion that gives her legs in exchange for her tongue and beautiful voice, and she warns her that once she becomes a human, she will never be able to return to the sea. Consuming the potion will make her feel as if a sword is being passed through her body, yet when she recovers, she will have two human legs and will be able to dance like no human has ever danced before. However, she will constantly feel as if she is walking on sharp knives. In addition, she will obtain a soul only if she wins the love of the prince and marries him, for then a part of his soul will flow into her. Otherwise, at dawn on the first day after he marries someone else, the Little Mermaid will die with a broken heart and dissolve into sea foam upon the waves.
After she agrees to the arrangement, the Little Mermaid swims to the surface near the prince's palace and drinks the potion. She is found by the prince, who is mesmerized by her beauty and grace, even though she is considered dumb and mute by everyone in the kingdom. Most of all, he likes to see her dance, and she dances for him despite suffering excruciating pain with every step. Soon, the Little Mermaid becomes the prince's favorite companion and accompanies him on many of his outings. When the prince's parents encourage their son to marry the neighboring princess in an arranged marriage, the prince tells the Little Mermaid he will not because he does not love the princess. He goes on to say he can only love the young woman from the temple, who he believes rescued him. It turns out that the princess from the neighboring kingdom is the temple girl. The prince declares his love for her, and the royal wedding is announced at once.
The prince and princess celebrate their new marriage on a wedding ship, and the Little Mermaid's heart breaks. She thinks of all that she has sacrificed and of all the pain she has endured for the prince. She despairs, thinking of the death that awaits her, but before dawn, her sisters rise out of the water and bring her a knife that the Sea Witch has given them in exchange for their long, beautiful hair. If the Little Mermaid kills the prince and lets his blood drip on her feet, she will become a mermaid once more, all of her suffering will end, and she will live out her full life in the ocean with her family.
However, the Little Mermaid cannot bring herself to kill the sleeping prince lying with his new bride, and she throws the knife and herself off the ship into the water just as dawn breaks. Her body dissolves into foam, but instead of ceasing to exist, she feels the warm sun and discovers that she has turned into a luminous and ethereal earthbound spirit, a daughter of the air. As the Little Mermaid ascends into the atmosphere, she is greeted by other daughters who tell her she has become like them because she strove with all her heart to obtain an immortal soul. Because of her selflessness, she will be given the chance to earn her own soul by doing good deeds to mankind for 300 years and will one day rise up into the Kingdom of God.
More to the story the ending was changed the orginal had a alternate ending I found out about in my research notes below:
The working title of the story was "Daughters of the Air". The daughters of the air say they can earn souls simply by doing three hundred years' worth of good deeds, but Andersen later revised it to state that all this depends upon whether children are good or bad. Good behavior takes a year off the maidens' time of service, while bad behavior makes them weep and a day is added for every tear they shed. This has come under much criticism from scholars and reviewers, with one commenter writing, "This final message is more frightening than any other presented in the tale. The story descends into the Victorian moral tales written for children to scare them into good behavior." P. L. Travers, author of Mary Poppins and noted folklore commentator, says, "But a year taken off when a child behaves and a tear shed and a day added whenever a child is naughty? Andersen, this is blackmail. And the children know it and say nothing. There's magnanimity for you."