A fact-packed introduction to the wonders of the sea with easy-to-read text and superb photographs.Subjects include coral reefs, whales and dolphins, undersea exploration and environmental threats.With internet links to exciting websites, including a virtual tour of the seabed and downloadable images of weird and wonderful sea creatures. Chapters in this book include:- Seas and oceans- Underwater life- Who eats who?- Hiding- Coral reefs- Coral reef animals- Living together- Poisonous animals- Sharks- Rays- Whales- Dolphins- Deep sea- On the move- Cold oceans- Waves- Currents- Tides- Coasts- Seashore life- Dangerous seas- Boats and ships- Exploring the depths- Unknown seas- Shipwrecks- Using the oceans- Dirty oceans- Emptying the oceans- Getting warmer- The future of the oceans- Undersea facts and records