Harry is a little sand crab who stays close to the water, keeps his gills wet, and sometimes races along the beach with his friends, Kainan and Mateo. One day when he is busily digging a burrow, Harry notices a man on the beach photographing him and taking notes. Tim is an oceanographer who has no idea he is about to save Harry from tragedy. When Harry comes out of his burrow on his way to the ocean, he slips and lands on his back. As a hungry bird flies overhead, Harry fears the worst. But when Tim runs to his rescue and turns Harry over, just in time, a friendship develops between man and sand crab. As they talk, Harry explains about himself, the environment, and why animals must stay where they belong to survive. In this fun and educational children's book, a little sand crab-saved from tragedy by a scientist-teaches the scientist valuable lessons about his life and his important role in keeping the ocean clean.