Journey 80 million years back in time to an age when mighty dinosaurs dominated the land - and an equally astonishing assortment of ferocious creatures swam, hunted, and fought for survival beneath the vast, mysterious prehistoric seas.
Sea Monsters: A Prehistoric Adventure is a 2007 American IMAX 3D documentary film by National Geographic, about prehistoric marine reptiles. It alternates modern-day sequences about the work of scientists studying the animals with computer-animated scenes depicting the prehistoric past.