The Little Mermaid IV: Under the Sea Below

Now 4 years later, Ariel and her daughter Melody now live in the sea, King Triton had passed away and left Ariel as queen of the sea, but when Ariel's long-lost sister, Sycylla, returns, she has killed Ariel's husband, Prince Eric (or so she thought), and is determining to have the Trident to become the new queen of the sea. And Melody has to save her mother and Atlantica.

Premiered
September 17, 2012

Characters
Main Antagonists:
 * Melody (Maggie Blue O'Hara) - in the end,
 * Ariel (Jodi Benson) - transforms back into a mermaid and needs to rejuvanate the power of the Trident!, in the end,
 * Prince Eric (Christopher Daniel Barnes) - in the end,
 * Sebastion (Ahmed Best) - in the end,
 * Flounder (Cam Clarke) - in the end,
 * Scuttle (Hank Azaria) - in the end,
 * Urchin (Jason Lee) - in the end,
 * Aquata (Kath Soucie) - in the end,
 * Andrina (Tara Strong) - in the end,
 * Arista (Kattie Griffin) - in the end,
 * Attina (Kari Wahlgren) - in the end,
 * Adella (Ashley Johnson) - in the end,
 * Alana (Jennifer Hale) - in the end,
 * Scylla (Angelina Jolie) - the main antagonist, and Ariel's long lost sister, in the end,
 * Leech (George Lopez) - Scylla's pet Squid!, in the end,

Trivia

 * Ariel's transformation back to a Mermaid is similar to the way Kuscko into a Llama!
 * Scylla's name comes from the Oddysey!
 * Melody looks more like her mother in this film!