Since the Earth's birth, the ocean has nurtured countless lives. During the age of dinosaurs, the ocean was home to creatures different from those we see today. In Japan, where dinosaur-era marine strata are widely distributed, various fossils of marine reptiles have been discovered, attracting much attention. This exhibition focuses on the gigantic creatures that dominated the oceans, showcasing their captivating allure.

★ "Wakayamasouryu" (Wakayama Prefectural Museum of Natural History Collection), the first complete mosasaur skeleton in Asia

★ "Hobetsu Arakiryu" (Hobetsu Museum Collection), a complete skeleton of a plesiosaur, designated a natural monument of Hokkaido

★ Complete skeleton of the North American plesiosaur Thalassomedon (Mie Prefectural Museum Collection), from the same era as the Mifune Group