Table of Contents
THIS SERIES
TITLES IN
CLAMS
IN THE SAND
CRABS
ON THE BEACH
JELLYFISH
IN THE WATER
SEA GULLS
IN THE SKY
SEA LIONS
ON THE SHORE
SEA STARS
IN THE TIDE POOL
IN THE TIDE POOL
Critters by the Sea
ISBN: 9781538325919
6-pack ISBN: 9781538325926
GRL: N
ROSEN / PowerKids Press
SEA STARS IN THE TIDE POOL
JO MARIE ANDERSON
SEA
STARS
JO MARIE ANDERSON
New York
CLAMS
Critters by the Sea
JO MARIE ANDERSON
IN THE TIDE POOL
SEA
STARS
Published in 2018 by The Rosen Publishing Group, Inc.
29 East 21st Street, New York, NY 10010
Copyright 2018 by The Rosen Publishing Group, Inc.
All rights reserved. No part of this book may be reproduced in any form without permission in writing from the publisher,
except by a reviewer.
First Edition
Editor: Melissa Ra Shofner
Book Design: Tanya Dellaccio
Photo Credits: Cover Craig Tuttle/Getty Images; pp. 324 (background image) Kemal Mardin/Shutterstock.com;
p. 5 DeeAnn Cranston/Shutterstock.com; p. 7 (top) Ed Reschke/Photodisc/Getty Images; p. 7 (bottom) Dan Bagur/Shutterstock.com;
p. 9 (top) Ethan Daniels/Shutterstock.com; p. 9 (bottom) Greg Amptman/Shutterstock.com; p. 11 (top) Lori Froeb/
Shutterstock.com; p. 11 (bottom) waldo81/Shutterstock.com; p. 12 Darren J. Bradley/Shutterstock.com; p. 13 Logan Carter/
Shutterstock.com; p. 15 (top) Norbert Wu/Minden Pictures/Getty Images; p. 15 (bottom) Robert F. Sisson/National Geographic/
Getty Images; p. 16 SewCream/Shutterstock.com; p. 17 L Newman & A Flowers/Science Source/Getty Images;
p. 19 J Martinez Andrew/Science Source/Getty Images; p. 21 (top) Rich Carey/Shutterstock.com; p. 21 (bottom) Andrea Izzotti/
Shutterstock.com; p. 22 Luiz Felipe V. Puntel/Shutterstock.com.
Cataloging-in-Publication Data
Names: Anderson, Jo Marie.
Title: Sea stars in the tide pool / Jo Marie Anderson.
Description: New York : PowerKids Press, 2018. | Series: Critters by the sea | Includes index.
Identiers: LCCN ISBN 9781538325919 (pbk.) | ISBN 9781538325216 (library bound) | ISBN 9781538325926 (6 pack)
Subjects: LCSH: Starshes--Juvenile literature.
Classication: LCC QL384.A8 A53 2018 | DDC 593.93--dc23
Manufactured in the United States of America
CPSIA Compliance Information: Batch #BW18PK: For Further Information contact Rosen Publishing, New York, New York at 1-800-237-9932
Ancient Echinoderms .................................
Sea Star Bodies .....................................
So Many Sea Stars ...................................
Underwater Habitats ................................ 10
Sea Stars of North America ........................... 12
Slow Eaters ....................................... 14
Growing Sea Stars .................................. 16
Northern Sea Stars and Blue Mussels ................... 18
Keeping Coral Safe ..................................
Sea Stars and People ................................ 22
Glossary .......................................... 23
Index ............................................
Websites .........................................
CONTENTS
Sea stars are echinoderms. Echinoderms are
a group of animals with tube feet and no backbone.
Theyre only found in oceans. Echinoderms were on
Earth over 200 million years before the dinosaurs!
Theyre some of the most common animals on Earth.
There are six classes, or groups, of echinoderms.
Sea stars belong to a class called Asteroidea. This
means star shaped. Sea stars are sometimes called
starsh. While many do look like stars, starsh arent
actually sh.
SEA CREATURE FEATURE
Other echinoderms include sea urchins,
brile stars, sea lilies, and sea cucumbers.
ANCIENT
ECHINODERMS
This orange bat star is an
echinoderm. So are the purple sea
urchins next to it. These colorful
sea creatures live near the Channel
Islands off the coast of California.
Sea stars may have between 5 and 40 arms.
Their arms, which are called rays, grow around a
central disk in the middle of their bodies. A hard,
shell-like skin gives them shape. On the bottom of
their rays, sea stars have hundreds of tiny tube feet.
On the tips of sea stars rays are small spots
called eyespots. Eyespots cant see, but they do let
sea stars sense light and dark. Sea stars can also
sense smells using special parts of their skin.
SEA CREATURE FEATURE
Sea stars move using waterpower. Water enters through openings
in a sea stars central disk and f lows through its body. The water
is then pushed out its tube feet, which makes the sea star move.
SEA STAR BODIES
TUBE FEET
This animal is called a
nine-armed sea star.
Nine-armed sea stars may
grow to be 11.8 to 15.7 inches
(30 to 40 cm) wide.
There are about 1,800 species of sea stars living
in Earths oceans. They come in many sizes and colors.
Catalas sea stars are some of the heaviest. They can
weigh up to 13 pounds (5.9 kg). These white-and-pink
sea stars live in the Pacic Ocean near the Philippines,
Indonesia, and Australias Great Barrier Reef.
The smallest sea stars are paddle-spined sea
stars. Theyre smaller than a childs ngernail. Theyre
found along the coast of Australia. They live in
seaweed so they arent carried away by waves.
SEA CREATURE FEATURE
Sunower sea stars come in many colors, including red, brown,
orange, yellow, and purple. They grow to look like sunowers.
SEA STARS
SO MANY
Sea stars are sometimes given
names based on what they
look like. This chocolate
chip sea star looks like its
covered in chocolate chips!
CHOCOLATE CHIP SEA STAR
SUNFLOWER SEA STAR
Sea stars are found around the world, from the
icy waters of the Arctic Ocean to the warmer waters
of the South Pacic. Each species has its own special
habitat . Some oat quietly through the water, while
others stay put on sandy ocean oors.
Sea stars are often found in tide pools. Tide
pools are pools of water that form along rocky shores
when the tide recedes . To stay wet when the water is
very low, sea stars hide under seaweed and rocks.
SEA CREATURE FEATURE
Granulated sea stars live in the Indian and
Pacic Oceans. Theyre commonly found in the
Great Barrier Reef o the coast of Australia.
HABITATS
UNDERWATER
Living in a tide pool isnt easy. Conditions
are always changing as tides come and
go. The animals that live in tide pools,
such as sea stars, have adapted to deal
with the changes in their environment .
GRANULATED SEA STAR
There are many species of sea stars living along
