AQUAMARINE is the story of Claire (EMMA ROBERTS) and Hailey (JOANNA “JOJO” LEVESQUE), two 13-year-old best friends who embark on the adventure of their lives when they discover a mermaid (SARA PAXTON) named Aquamarine in a swimming pool. Aquamarine had washed ashore after a big storm battered the small town Florida beach club where Claire lives with her grandparents. Claire and Hailey are trying to come to terms with Hailey’s impending departure: She’s moving to Australia with her marine biologist mother after this last weekend of the summer.
The beautiful, blue-haired, 18-year-old mermaid swam away from home just before her arranged marriage, in search of real love. If she can prove to her father that love is not a myth, he’ll let her out of the underwater wedding, but he’s only giving her three days. Aqua enlists the help of Claire and Hailey, who are self-styled relationship experts—educated from the pages of magazines that they read and quote daily.