This book takes you on a journey, from the rockpools along the shoreline, to the deepest, darkest depths of the ocean, to reveal an incredible and rarely seen world. You will zoom in on the intricate patterns on a giant clam, see the surprising beauty of fish gills when viewed under the microscope, and discover the tiny organisms that are the very building blocks of life. Some of them are harmless, some of them deadly. Some are alien in appearance, others are startling in their beauty. Without them, life as we know it would not exist. Welcome to the amazing hidden world under the sea.