A turtle slowly paddles along the Amazon River. Suddenly, something from beneath the water bumps the turtle. The little reptile tries to swim faster. Then another bump--and, suddenly, the huge jaws of a bull shark close around the turtle. What is this ferocious ocean predator doing in the murky waters of a jungle river? Filled with information perfectly suited to the abilities and interests of its primary grade audience, this colorful, fact-filled book gives readers a chance to learn about the lives of these underwater hunters. The book will also help readers develop their powers of observation and challenge them with activities and critical-thinking questions about the shark's physical characteristics, its everyday life, and its hunting abilities.