"An introduction to the world's oceans, with information about how they formed, how they affect Earth's climate, the plants and animals that live in them, and the dangers they face. Features include fact boxes, maps, photographs, a glossary, and a list of recommended books and website"--Provided by publisher.

Introducing the sea and its marvels -- The world ocean -- Amazing undersea world -- The fish in the sea -- Living in water -- The seashore and shallows -- The open ocean -- Coral reefs -- Exploring the reef -- The world's biggest reef -- The deep ocean -- The hunters and hunted -- Sharks and rays -- Whales -- Dolphins and porpoises -- Seals and sea otters -- Crusty crustaceans -- Magnificent mollusks -- octopuses and squids -- Sponges -- Strange sea shapes -- Sea birds -- Marine reptiles -- Ocean wanderers -- Threats to ocean life.