"Twice a day when the tide goes out, an astonishing world is revealed in the tide pools that form along the Pacific Coast. Some of the creatures that live here look like stone. Others look like plants. Some move so slowly it's hard to tell if they're moving at all, while others are so fast you're not sure you really saw them. The biggest animals in the pool are smaller than your hand, while the smallest can't be seen at all without a microscope. During low tide, all these creatures - big, small, fast, slow - are exposed to air and the sun's drying heat. And so they have developed ways to survive the wait until the ocean's return." -- Amazon.