While dinosaurs patrolled the lands, massive prehistoric sharks, giant scorpions, and colossal squid cruised the ancient oceans – most with just one thing in mind: eat or be eaten. In this companion to the best-selling ENCYCLOPEDIA PREHISTORICA: DINOSAURS, pop-up masters Robert Sabuda and Matthew Reinhart explore the prehistoric underwater world, where monsters like megalodon ruled the waves. * Full of captivating facts! * More than 35 breathtaking pop-ups! * Discover the monstrous creatures that prowled (and still may!) beneath the surface. . .

Just when you thought it was safe to go back in the water! Celebrate the New York Times best-selling 3-D look at prehistoric creatures of the deep. While dinosaurs patrolled the lands, massive prehistoric sharks, giant scorpions, and colossal squid cruised the ancient oceans — most with just one thing in mind: eat or be eaten. Pop-up masters Robert Sabuda and Matthew Reinhart explore the prehistoric underwater world where monsters like megalodon ruled the waves. Full of captivating facts and more than thirty-five breathtaking pop-ups, this incredible volume is sure to astonish and amaze everyone from budding marine biologists to confirmed landlubbers.