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9780061115776

Extreme Coral Reef!: Q&A

by
  • ISBN13:

    9780061115776

  • ISBN10:

    0061115770

  • Format: Hardcover
  • Copyright: 2008-05-07
  • Publisher: HarperCollins Publications
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Summary

Some coral is extremely hard-with a skeleton made of stone. Some coral is extremely soft-so soft, it sways in the ocean current. Most coral animals are extremely small-the size of a pencil eraser. But some coral reefs are extremely large-bigger than New Mexico! Tiny coral animals can build huge reefs, and most living things in the world's warm seas depend on those reefs to survive. Giant manta rays and tiny shrimp, bright parrot fish and snakelike moray eels all need coral reefs for food and shelter. Dive into Extreme Coral Reef! Q&A to find out how important these beautiful structures are to life in the ocean!

Supplemental Materials

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Excerpts

Extreme Coral Reef! Q&A

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.

Extreme Coral Reef! Q&A. Copyright © by Melissa Stewart. Reprinted by permission of HarperCollins Publishers, Inc. All rights reserved. Available now wherever books are sold.
Excerpted from Extreme Coral Reef! by Melissa Stewart
All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.

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