Using short simple sentences, this book starts by introducing the concept of biome as a large area with certain plants, animals and climate. It then explains that marine waters are biomes.  Of the three main marine biomes, oceans are the largest.  Coral reefs and estuaries, the other main marine biomes, are glossed over and never clearly identified in the text with headings or bold font.  Nor do the three main biomes appears in the glossary. Confusing the reader more, coral reefs are part of the ocean, yet in the book are considered separate from ocean biomes. The book would benefit from the use of non-fiction text features to clarify the complex concept of biomes without adding complexity to the text.

A few examples of plants and animals are given.  The climate of coral reefs is described.

Contains Table of Contents, Glossary, and Index.