Coral reefs are sometimes called "cities under the sea". This is because they are homes to thousands of different types of animals. Coral reefs are probably the most action-packed parts of the ocean. And what's more--even though coral looks and feels like rock, it's not--coral is alive! Turn the pages to learn all about this amazing part of ocean and learn 20 science Smart Words along the way -- Back cover.

20 science vocabulary words in every book! -- Cover.