Alariel

Alariel is the het ship between Aladdin and Ariel from the Aladdin and The Little Mermaid fandoms.

Canon
As Aladdin and Ariel are from different series, they have never met in canon. However, the two coincided in many Disney crossover media. Their Once Upon A Time counterparts do have them meeting each other through Jasmine in season six, where he and the two find Ariel while looking for Jafar's genie lamp.

At the start of their films, both characters feel the desire of leave the environment in which they live and explore a new one. Aladdin was tired of his street rat life, while Ariel wanted go to the surface due to her curiosity about it. During their films they fall in love with someone they can't be with due to them living in a completely different environment. Aladdin fell in love with a princess when he is a thief and pleb, while Ariel fell in love with a human when she is a mermaid. Because of this, they feel more motivated to follow their wished and go to someone (Ursula and Genie) to have a better chance of being with their love interests. Ariel is turned into a human so she can be with Eric, and Aladdin is turned into a prince so he can be with Jasmine. Even though the truth about them is revealed at the end of their movies and they learn about they mistakes, they end up getting married with their love intersts anyways.

Fanon
Aladdin and Ariel have a decent following, commonly on DeviantArt. People believe they would get along very well. In some AU's Aladdin will take Eric's place or Ariel will take Jasmine's. Many fans commonly have them meeting in Agrabah, like their Once Upon a Time counterparts. Occasionally the ship is set in Atlantica where Aladdin is sometimes a merman, while the Agrabah setting commonly has Ariel is her human self. Some fans have even merged two of their similar worded songs together to make "Part of Your Whole New World". The Aladdin/The Little Mermaid crossover ship sometimes has a few fans who also ship Jasmine and Eric together. As a fun way of couple switching for fans of either of the two ships.

On AO3, the ship only has two works. Meanwhile, in FFN there are 7 fanfics in the crossover category.

Fandom
FAN FICTION
 * Aladdin/Ariel (Disney) tag on FanFiction.net
 * Aladdin/Ariel (Kingdom Hearts) tag on FanFiction.net
 * Aladdin/Ariel (Kingdom Hearts) tag on FanFiction.net

Trivia

 * Aladdin and Ariel have appeared in several Disney media crossover.
 * Both of them appear in the Once Upon A Time.
 * Both of them are from two of the few known Disney films that have been turned into Broadway shows, and were featured in Disney On Ice.
 * In The House of Mouse they are two of the common guests at the club.
 * They appear in a few of the same Kingdom Hearts games.
 * They are apart of the Descendants series, where Aladdin has a son while Ariel has a daughter.
 * Both of them as Guardians in the Disney Mirrorverse app game.
 * In the Broadway version of The Little Mermaid, Ursula is Ariel's wicked aunt, while a few versions of Aladdin have Jafar as Aladdin's uncle.
 * Both Aladdin and Ariel have their own trilogies and a TV series.
 * Both of their animated films have become live-action remakes.
 * Aladdin and Ariel both sing songs that have the word "World" as the center theme/metaphor.