They're probably missing teeth from getting smacked by gator tails.
The Black Cajun lady who helped raise us used to call at Christmas. A few years ago, she called and began speaking to one of the teenagers, who looked at the phone weirdly (I could see her across the room) and yelled, "Mom! It's one of your foreign students!"
I could not begin to eat some of the stuff that the swamp folks eat. Honestly, if you know what some of that looked like when it was still alive...