Heather Moore Niver 
20 Fun Facts About Sharks [PDF ebook] 

Sharks are one of nature’s fiercest predators. Sharks also don’t have any bones, and they can lose up to 30, 000 teeth in a lifetime. Sharks have to keep swimming all the time in order to keep breathing. Inside this book, readers will discover these and many more fun sharks facts. Amazing photographs of nature’s deadliest creatures in the wild are sure to thrill readers of all ages.