Explores the diversity of life in the sea, including predators and prey, the coral reef, and life in the twilight zone of the ocean, with information on products of the ocean, ocean explorers, and preservation of this natural resource. Discover the vast waters that cover the Earth's surface, the sunlit shallows to the mysterious depths, and amazing ocean wildlife.
Counted ratings come from accounts older than 7 days and were made on or after publication. Finished readers weigh ×1.0. Readers who have not finished yet weigh ×0.5. Did-not-finish ratings are shown but not counted.