Includes bibliographical references (page 31) and index.

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

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.

830L Lexile

Grade 4 to 6.