Amazon.com: Spirit Halloween Adult Ariel Costume The Little Mermaid, Women, Size ADULT SMALL, Multicolor : Clothing, Shoes & Jewelry Amazon.com: Spirit Halloween Adult Ariel Costume Disney Princess, Women, Size ADULT MEDIUM, Multicolor : Clothing, Shoes & Jewelry 25 Mermaid Halloween Costumes For The Whole Family While everyone else is getting into the spooky spirit of Halloween, my daughter is swimming against the tide (pun intended!) and rocking a beautiful mermaid costume! Thank you @mermaids_of_arabia for this