[H2O: Just Add Water]

Will decides after a long day of classes to go diving in the ocean, looking at the marine life and collecting nice-looking shells. His mermaid friends and meddlesome sister are away, so he thinks he will have the whole rest of the day to himself. That proves untrue when he surfaces to take a break and finds someone reading a book near his things. Wanting to be friendly, he decides to introduce himself.