The Mississippi River is home to the alligator, one of the most fierce predators in North America. These big reptiles grow big in this habitat. Find out how big they can get by watching this video ...

The American alligator she tagged on Aug. 16, 2014, measured 15 feet 9 inches long, and weighed 1,011.5 pounds, besting the former SCI record—a 14-foot 8-inch gator killed in Chalk Creek, Texas ...