The Little Mermaid AU

The Little Mermaid AU is an AU introduced through fanart, depicting the Big Four (or at least one of the characters) as mermen and mermaids. This can be considered a spinoff of Fairy Tale AU and Hybrid AU.

About the AU
This AU was formed through fanart of the Big Four (most commonly Jack and Hiccup) depicting them as merfolk or humans interacting with merfolk. Like its namesake, most writers and artists use Disney's The Little Mermaid as a template, but this is not required.

For whatever reason, this AU is most often used as a scenario for the pairing Hijack.

Spinoff AUs of The Little Mermaid

 * Storybrooke
 * Descendants
 * Kingdom Hearts
 * Shrek
 * Ralph Breaks the Internet

Other Merfolk related AUs

 * Barbie Mermaids
 * Voltron Space-Alien Mermaids
 * Pirates of the Caribbean: On Stranger Tides
 * Harry Potter and the Goblet of Fire
 * DC
 * H2O
 * Aquamarine

Hiccup Horrendous Haddock III
As a merman, Hiccup is often portrayed as having a prosthetic tail fin, as a counter part for his leg. His tail is often green in color. Toothless is most often portrayed as a shark, dolphin or orca. Hiccup would most likely have the same basic idea as he did on Berk just underwater. The dragons are often portrayed as existing sea animals, extinct sea animals or mythological sea animals. He is also portrayed as Eric from The Little Mermaid as Merida is portrayed as Ariel, because of the Mericcup pairing.

An episode of the Disney The Little Mermaid TV series, "Heroes", features Ariel coming across mermen dressed as Vikings and living in a land called Valhalla, making the possibility of Hiccup and Ariel meeting each other very likely.

Jack Frost
Being the mysterious, magical being, Jack is the one most often portrayed as the Merman. But also as Eric from The Little Mermaid, because of Jelsa, Jarida and Jackunzel pairings.

Merida DunBroch
She is often portrayed as a mermaid, but when it comes to The Little Mermaid she is portrayed as Ariel, because of her hair, as Hiccup or Jack would be portrayed as Eric, because of the Mericcup and Jarida pairings.

Rapunzel Corona
She is also portrayed as Ariel from The Little Mermaid as Jack is portrayed as Eric, because of the Jackunzel pairing.

In the Tangled TV series episode "There's Something About Hookfoot", a mermaid named Seraphina wins the affection of Hook Foot and befriends Rapunzel and the others.

Princess Anna
She is portrayed as an average mermaid or as Ariel from The Little Mermaid, because of her hair.

Queen Elsa
She is often portrayed as an average mermaid, but is still allowed to have her ice powers because of the movie Frozen. Also she is portrayed as Ariel from The Little Mermaid, because of Jelsa.

Moana Waialiki
Moana's love for the ocean easily portrays her as an average mermaid, often with a red colored tail. Pua is sometimes featured as a "merpig" (a pig with a fish tail) beside her. She is also portrayed as Ariel from The Little Mermaid, as they both have dreams to explore the world beyond their home and have a father that wants to keep his daughter safe, at home. She can also be portrayed as Melody from The Little Mermaid 2, as they both have dreams that involve the sea. Her necklace can serve as Melody's magical locket, for its shell-like design and was given to her by a grandparent.

Maui
Maui is seen as an average merman with a shark tailfin, due to his Fish Hook acting up and turning the top part of his body into a shark's head and keeping the bottom part human; and vice versa.

The Guardians
Being mysterious, magical beings, the Guardians are easily portrayed as Merfolk. While Toothiana's Fairies and North's Yetis and Elves are existing sea animals or mythological sea animals.

In the Guardians of Childhood book series, that inspired the 2012 DreamWorks film, Sandy shares his home realm with merfolk.

Mavis Dracula
Falling in love a human and having a protective single father heavily portrays Mavis as Ariel from The Little Mermaid. While being a vampire could also make her a black tailed mermaid, since there are stories about mermaids taking the lives of sailors by drowning them and with both being "creatures" that exist in stories; as well as having a human-like appearance (even when it is only the top part for mermaids while vampires have paler skin).

In Hotel Transylvania 3: Summer Vacation, Mavis had surfed on the back of a whale and mimicked a seashore, while scopa diving with her family and the other guest monsters on the cruise ship, and had surfed on the back of a dolphin with Johnny during their date night on the island. In which could have fans featuring mermaid Mavis spending time or befriending one or all three of those kind of sea animals.

Vanellope von Schweetz
Since Vanellope meets the Netizen version of Ariel (in her human form) of Disney's The Little Mermaid in Ralph Breaks the Internet, while traveling through the physical world within the real-life internet, fans can cast Vanellope as her for fun. While Vanellope's dark hair, her young age and being a princess, could have her as Ariel's sea loving daughter, Melody from The Little Mermaid 2. As both girls feel draw to what people have tried to keep them away from.

Olaf
Some fans have cast Olaf as Ariel from The Little Mermaid, for fun.

Zephyr Haddock
Since Hiccup is sometimes cast as Eric from The Little Mermaid and Zephyr is Hiccup's daughter and first born child, fans could have an older version of Zephyr as Melody from The Little Mermaid 2, for fun.

Mother Gothel
Gothel's false act of kindness, so she could gain the trust of others for her own selfish reasons, could possibly cast her as the sea witch Ursula from The Little Mermaid.

Liv Amara
Having two pet eels, that were stolen from the San Fransokyo aquatic center, had turned High Voltage into humanoid eel mutants, and Liv telling Momakase that she can "make dreams come true", fans could have her as the sea witch Ursula from The Little Mermaid.

Fanfiction

 * The Crippled Drake by Paoshirou-Hozomi
 * What the Water Gave Me (HiJack) by KT-ExReplica
 * Mermaids are Real! by Aiko-Wind
 * Merfolk by Tears and Rain
 * Hijack Oneshot Requests (Chapter 32) by Alexandria Keating
 * How To Train Your Dragon: The Musical (Chapter 18) by Litwick723
 * Caves and Cold Waters by Infrared-Ultraviolet
 * The Merman and the Viking, Part 1 by HorrorFan6
 * The Little Spirit by Katherined
 * The Little Spirit 2: Return to the Frost by Katherined

Videos

 * The Little Mer-Vikingness Remake Trailer by Aaron The Viking Meerkat
 * (silent edit) Mermaids - Gothel/Elsa MEP part by Asmeeria
 * Poor unfortunate souls Mandrake tribute by ToxicRikki
 * Moana + The Little Mermaid - Where You Are / Under the Sea - A Cappella Disney Mashup by Scott & Ryceejo

Articles/Links

 * BH6 AU Ideas | Mermaids AU
 * BH6 AU Ideas | Merfolk AU