Contents

Contents : Underwater geography (our oceans -- the sea floor -- sea upheavals -- currents and tides) -- Life in the sea (river meets sea -- the seashore -- coastal seas -- coral reefs -- camouflage -- polar seas -- ocean meadows -- life in the twilight zone -- ocean swimmers of the dark -- life on the ocean floor) -- Exploring the oceans (early exploration -- wrecks and treasures -- submersibles -- research ships) -- Ocean mysteries (sea legends -- where did they go -- mysteries of migration) -- Exploiting the oceans (food from the sea -- oils and minerals -- the perils of pollution -- the future of the oceans -- conserving the oceans) -- ocean facts -- glossary -- index.