Looks at the oceans and seas around the world, describing the creatures found in them, threats they face, and recommendations on ways to preserve the ocean ecosystem.

Introduction -- Oceans in peril -- Ocean world: rocks and water -- Ocean geology -- The moving ocean -- Ocean life zones -- Cataloging life -- Coastal waters -- Temperate waters -- Tropical waters -- Polar waters -- Open waters -- The ocean deeps -- The world's oceans and seas -- The Atlantic -- The Pacific -- The Indian Ocean -- The Southern Ocean -- The Arctic Ocean -- The seas of Europe -- The seas of Eurasia -- The South China Sea.