In Nancy Drew: Sea of Darkness, Nancy must find a fish token to slide across the the maze, located on the left side of the box hidden in the secret room on the ship.
Use the mouse over the arrows or use your keyboard arrow keys to slide the fish through the maze, changing its shape or color to pass through doors and get to the X spot at the top right of the screen.
The steps are different for Amateur or Master Sleuth levels. Refer to the video for all the steps.
