What Are Fish?

What Are Fish? book cover — Fish Are Amazing 4 A Home Under Water 6 How Fish Breathe and Swim 8 What Do Fish Look Like 10 Some Funny-Looking Fish 12 Sharks 14 What Do Fish Eat 16 The Life Cycle of Fish 18 Why We Need Fish 20 Pet Fish 22 Major Threats to Fish 24 How We Can Help Fish 26 The Wonderful World of Fish 28 Glossary 30 For More Information 31 Index 32 CONTENTS

What Are Fish? — page 1 — Fish are a kind of animal that lives in water They come in many sizes shapes and colors Gobies one of the smallest ﬁsh are less than half an inch 13 millimeters long The whale shark the largest ﬁsh can be 59 feet 18 meters long Some ﬁsh are plain while others like FISH ARE AMAZING Gobies are one of the largest ﬁsh orders There are more than 2,000 species 4

What Are Fish? — page 2 — clownﬁsh and lionﬁsh have bright colors and patterns There are ﬁsh that look like plants rocks or snakes There are ﬁsh that can change color and some that glow in the dark Fish live almost anywhere there is water including rivers lakes and oceans They are a major source of food for people and for other animals Fish are the oldest known vertebrates they have lived on Earth for more than 450 million years There are more than thirty thousand species or kinds of ﬁsh New ones are discovered every year Vertebrates are animals that have a backbone Coelacanths SEEL-uh kanths ﬁrst appeared on Earth about 350 million years ago Vocabulary 5

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