Florida Cottonmouth or Water Moccasin
(Agkistrodon piscivorous conanti)
When I was a kid, I once saw a movie (yes, movies did exist way back then!) set in a swampy area that was meant to be Florida, as only Hollywood could depict it. There was a dramatic scene wherein characters were trying to wade through waist-deep black water, and they were attacked--yes, attacked--by several water moccasins at once, and much shouting and snake biting and flinging away of serpents went on. I have no clue what the movie was, who starred in it, or anything else. I can, however, still picture that utterly ridiculous scene, which I knew to be utterly ridiculous even at that point in my life.