Rocky the Hermit crab welcomes you to his world of tide pools along the Pacific coast of Northern California. It's an exciting place, constantly changing as the tides rise and fall. Rocky is a clever young crab who noticed that lots of the rocks, plants, and animals look like letters of the alphabet. As he sets out to find all the letters from A to Z, he points out some of his favorite spots, introduces you to his friends, and teaches you about this fascinating place.