BOOK DETAILS

Extreme Coral Reef! Q&A (Smithsonian Q & A)

Extreme Coral Reef! Q&A (Smithsonian Q & A)

by Melissa Stewart

ISBN: 9780061115776

Publisher Collins

Published in Science/Nature & Ecology, Children's Books/Science, Nature & How It Works, Science/Biological Sciences, Children's Books/Ages 4-8, Professional & Technical/Professional Science

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Sample Chapter

Chapter One

What is a coral animal?

Imagine a soft, tube-shaped creature about the size of a pencil eraser. One end is attached to a hard surface so the little animal won't float away. At the other end, a ring of tiny tentacles waves through the water. That's a coral animal, or a polyp.

Are all coral animals the same?

Scientists have discovered more than 5,000 species, or kinds, of coral animals in Earth's oceans. Certain coral polyps absorb, or take in, minerals such as calcium from the ocean water. They use the minerals to make limestone skeletons at the base of their bodies. Colonies of such polyps and their mineral base are called hard corals. Even dead coral skeletons keep the pattern or surface structure that is characteristic for each species and can be used for identification. Other species have polyps that make flexible, leatherlike skeletons and are called soft corals.



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Excerpted from "Extreme Coral Reef! Q&A (Smithsonian Q & A)" by Melissa Stewart. Copyright © 0 by Melissa Stewart. Excerpted by permission. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher. Excerpts are provided solely for the personal use of visitors to this web site.
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