Some online Barbie mermaid games include "Barbie Mermaid Princess Dress-Up Game" and "Barbie Mermaid Princess." These online games are free to play and only require a computer mouse for gameplay.
"Barbie Mermaid Princess Dress-Up Game" on DressUpGames.com is a game where the player starts out as Barbie who is playing a part in a new movie. The movie part requires her to look like a mermaid, so the player helps dress her up to look the part. The player changes her hair, makeup and clothing to look like a mermaid.
"Barbie Mermaid Princess" on GirlGames.com follows Barbie as she becomes a mermaid princess. It is similar to the dress-up game, though she is able to participate in various activities and have fun with her friends.