31 Days of Monsters: Sewer Gators

Not all supposed monsters are creatures whose existence is questionable. Sometimes it's just a matter of something being found where nobody would expect it. 
Name: American Alligator
Size: 11 to 15 feet from nose to tail.
Appearance: That of a typical alligator, though there are some reports of Albino specimens being seen or captured. 
Threat: Medium. They are known to attack, kill, and even eat humans when the opportunity presents itself, but they don't go out of their way to track or...