The Little Mermaid may not be a film that first comes to mind when thinking about the connection between Disney and Wicca or Witchcraft. However, the character of Ursula certainly embodies the stereotypical images of a witch.
Ursula is probably the only element in The Little Mermaid that relates particularly to Witchcraft and the occult. Ursula, we find out early in the film through the characters' conversations, was banished from the Kingdom (in the underwater city of Atlantica) by King Triton, Ariel's father. After this she eagerly awaited her chance to have revenge on King Triton.
Ursula is the stereotypical image of an ugly, evil witch. She is a large sea witch with white hair, evil eyes, and most importantly, tentacles from the waist down. She lives at the bottom of the sea where she tends her garden of lost souls, with two eels as her friends. Ursula tricks Ariel into givng her her voice in exchange for human legs. Ariel wants to be human in order to meet Prince Eric and have him fall in love with her. Ursula uses Ariel's voice, along with a new form, to make Eric fall for her, making him think that she was the one who rescued him. Ursula again uses shapeshifting to transform into a beautiful young woman and calls herself Vanessa. Ursula is again the symbol of evil in this Disney film, and is championed by the force of good, Ariel and her friends. Ursula transforms again at the end, making herself tremendously big in order to terrify Ariel and the others. This transformation ends up working against her when Eric uses a large wooden shaft from the ship to harpoon Ursula's heart and kill her.
Ursula is the stereotypical image of an ugly, evil witch. She is cunning, sly, and has magickal powers. Disney uses the image of a witch here in a negative way again, which is sure to upset those true witches and practitioners of Wicca. However, as I said before it does not appear to be Disney's intent to give a precise example of a witch or practitioner of Wicca. It uses the character of Ursula for entertainment purposes.