Disney On Ice. October 12, 1995 - 2001. They all have ponytails, instead of different hairstyles. Originally, only three Mersisters appeared in the show instead of six. These costumes were used in Walt Disney's World On Ice 3-D and Disney On Ice: In Search of 101 Dalmatians.
Disney On Ice. 1998 - January 2010. From 2003 to 2010 each of the mersisters often had the wrong tail color; for example: Andrina had a yellow tail, just like Adella. These costumes were used in Disney On Ice: The Little Mermaid, Disney Classics, Mickey and Minnie's Magical/Amazing Journey and Passport to Adventure.
Disney On Ice. September 1, 2006 - 2017. These costumes were used in Disney On Ice: Princess Wishes, Princesses & Heroes and Dream Big. Also, Adella and Alana had different tail colors.
Disney On Ice. September 2012 - present. Similar costumes to the Disney Live! ones. These costumes were used in Disney On Ice: Rockin' Ever After, Magical Ice Festival, Reach For The Stars and Find Your Hero.
Disney on Ice. Late 2013 - June 20, 2018. These costumes were only used in Disney On Ice: Passport to Adventure.
Disney On Ice. 2017 - present. Similar costumes to these from 2012, but they have the replica wigs from Disney Live! Also, Andrina and Alana have different tail colors. These costumes were only used in Disney On Ice: Dream Big.