Marlie is a pretty girl that hates doing chores and eating her veggies. She loves to swim. Her biggest wish is to become a fish so that she can spend all of her time swimming. She goes to her favorite swimming spot all of the time to talk to the fish. One day while swimming and talking to her fish friends her wish comes true. It is far better than she ever imagined. Gobi,the giant fish granted her the very thing she wanted. She meets some new friends in the water. Marlie learns a big lesson as a mermaid. A wise old turtle named Snort comes to her rescue.