Here is an exciting and informative guide to the natural history, geology, and exploration of the world's vast oceans. Superb, color photographs of incredible submersibles, realistic models of the sea floor, and the remarkable animals and plants that make up marine life offer a unique "eyewitness" view of the ocean's hidden wealth. See a sea spider crawling on the ocean floor, ocean research vessels in operation, a cuttlefish disappear in a squirt of ink, inside a decompression chamber, and an octopus escaping a predator by jet propulsion. Learn how a monitoring buoy measure temperature, about the world's major currents, why a hermit crab finds a second home, and how the earth's plates form. Discover where the deepest dive was made, the length of a giant tube worm, what fish eat at the bottom of the ocean, how a coral reef is formed, how dead man's fingers got their name, and much, much more.