Offers 12 fascinating facts about the world's oceans and seas. From the coral reefs and lagoons to salt marshes and estuaries, full-color spreads highlight the key features of the world s largest ecosystems.

Food is plentiful in intertidal zones -- People and animals depend on mangroves -- Salt marshes change with the tides -- Estuaries are the nurseries of the sea --Coral reefs are diverse ecosystems -- Lagoons come in many shapes and sizes -- Oceans are filled with fascinating creatures -- Marine plants provide safe havens for animals -- The deep sea is a mysterious place -- The sea floor is mountainous in places -- People affect most marine ecosystems -- People can help care for marine ecosystems -- Marine food web.