[Free Registration/Login may be required to access all resource tools.] What reptiles can you name? Snakes, alligators, and crocodiles are all reptiles. Modern reptiles live on every continent except Antarctica. They range in size from the newly discovered Jaragua Sphaero, at 0.6 inches, to the saltwater crocodile, at up to 23 feet. Learn more about reptiles in this learning module produced by CK-12.