Open water swimmers face sharks in Australia, jellyfish in the English and Irish Channels ... and alligators in the USA and China.
The alligators in the southern USA tend to be larger than their smaller cousins in the Yangtze River in China. How big? See above critter from Lake Weiss north of Birmingham, Alabama.
When the 28-foot (8.5-meter) alligator was caught by Alabama Parks and Wildlife game wardens, it had an 11-foot (3.3-meter) mature stag deer in its mouth.
From what we understand, there hasn't been an alligator this size sighted yet in the Acuatica 1K Swim in Florida's Lake Cane.