The reptiles arose from ancient amphibians some 300 million years ago, developing a protective, dry, scaly skin, tough-shelled eggs, and enlarged and improved lungs. Unlike their predecessors, reptiles were able to leave the aquatic lifestyle behind, leading to their rule over the planet for millions of years.
Today, however, only one quarter of the ancient reptilian orders are in existence. Luckily enough for this web site, of the species remaining, some decided to return to the water. Aquatic reptiles are generally considered to be reptiles that not only need water to survive, but which also spend a significant percentage of their lives in and around aquatic habitats.
To learn more about these creatures, follow the links below. After, you can test your knowledge with the trivia game and get your name in the Hall of Fame.