That's definitely a snapping turtle. I don't know what kind he is though. In Florida we have 2 kinds of snapping turtles, the "Florida snapping turtle" and the "alligator snapping turtle". The Florida snapping turtle doesn't get too large, around 35 pounds. The alligator snapping turtle gets HUGE, they can get up to 200 pounds. The one you have pictured looks like a Florida snapping turtle, which I think is also called a "common snapping turtle.