Never had or heard of a water moccasin getting in the boat from the water but it's the one snake in the south that scares the hell out of me. I know snakes will drop out of trees into a boat but I'm more of an open water kind of guy. It's always in the back of my mind while night fishing. I've also been in a cove in April when hundreds if not thousands of snakes were most likely making little snakes. It was fascinating and terrifying at the same time. This cove is known as "sailboat cove" because it's where a lot of sailboat owners dock their sailboats. Wonder if any of them got in their boat for a cruise and found a legless squatter? lol.