Water moccasin

A venomous North American snake (Ancistrodon piscivorus) allied to the rattlesnake but destitute of a rattle. It lives in or about pools and ponds, and feeds largely of fishes. Called also water snake, water adder, water viper.

any of numerous North American water snakes inhabiting fresh waters

venomous semiaquatic snake of swamps in southern United States