OK, here's my lame turtle experience
Bass fishing with brother-in-law I was visiting with in Mississippi (just south of Memphis).
We were in a small row boat on a runner of the Mississippi River and I noticed a small head floating by the bank and I alerted my BIL . He told me it was a snapping turtle and had nothing to worry about as long as I kept my fingers out of the water. About 40 minutes or so, I see another and again pointed it out to my BIL, that is when he stated that this one wasn't a turtle but instead was a water moccasin------------ I quickly ended my fishing for the day.
See, I'm from the Pacific NorthWest (western side) and we don't have venomous snakes in our rivers.
Sorry, my only turtle experience.