In this photo is a reptile usually found in fresh water in the southeastern United States. Which is it?

Paul Steadman, You are correct. Reptiles and amphibians differ in significant ways, and an animal cannot be both. Alligators are reptiles. Maybe the writer meant amphibious?

Being in the Southeast U.S, I have been fortunate enough to see alligators in person. From really safe distance of course...

How can an animal belong to two separate classes. A reptile is not an amphibian!