Discover the incredible abundance and variety of plants and animals that make the ocean their home-from deep, dark trenches, to lush, tropical atolls. Also learn about the currents, cycles, and life of the ocean itself, and how the health of the ocean affects life everywhere on the planet. DK, the best reference publisher, meets Google(tm), the world's best search engine in a comprehensive and authoritative series that's online, and sets the benchmark for reference. Providing complete and visually arresting reference at an entirely new level, e-links lead you to online information you can't get in a book: live and archival footage; sound buttons; interactive polls, quizzes, and games; links to organizations and the latest research. Each e-link tells you which keyword to use-then Google(tm) / DK take you straight to the safe, appropriate, and accurate online information.