Florida Alligator (IMAGE) University of Arizona Caption An alligator, part of the order crocodilia, makes its way through a Florida swamp. Only 25 different species of crocodilians exist. Credit John Wiens Usage Restrictions This visual may only be used for the purpose of posting or reporting of this news release. Please provide image credit as indicated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.