Courtesy of Brave Wilderness on the alligator snapping turtle.

Ocean swimmers occasionally see sea turtles swimming underneath them in tropical coastal waters. The green sea turtles never really get close enough to the swimmers in an encounter of any sort.

But open water swimmers definitely do not want to get too close to the alligator snapping turtle that is found primarily in American waters in the states of Florida, Texas, Kansas, Missouri, Iowa, Illinois, Indiana, Kentucky, Tennessee and South Dakota.

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