ion years ago! What were their lives like as they swam through the world's ancient oceans? This hi/lo title explores that question through leveled text and colorful illustrations. Readers will learn about Plesiosaurs' body parts, favorite foods, behaviors, and more. Features map the prehistoric world, compare Plesiosaurs' sizes, show off favorite foods, and more. The book ends with a two-page profile that puts important information about Plesiosaurs in one place!