The alligator is notorious for its bone-crushing bites. In addition, the alligator has been described as a "living fossil", having been extant for 200 million years, beginning in the Mesozoic Era.
A large adult American alligator's weight and length is 800 pounds (360 kg) and 13 feet (4.0 m) long, but can grow to 14.5 feet (4.4 m) long and weigh over 1,000 pounds (450 kg).According to the Everglades National Park website, the largest alligator ever recorded in Florida was 17 feet 5 inches (5.31 m), although according to the Florida Fish and Wildlife Conservation Commission web site the Florida state record for length is a 14 feet 5/8 inches (4.28 m) male from Lake Monroe in Seminole County. The largest specimen ever recorded was found in Louisiana and measured 19 feet 2 inches (5.84 m). The Chinese alligator is smaller, rarely exceeding 7 feet (2.1 m) in length. Alligators have an average of 75 teeth.
There is no measured average lifespan for an alligator.A specimen named Muja has resided in the Belgrade Zoo in Serbia since 1937, making it at least 73 years old. Another specimen, Čabulītis, in Riga Zoo, Latvia died in 2007 being more than 75 years old