American crocodiles are well-armored with tough, scaley skin.
Also unlike the alligator, the fourth tooth on the bottom jaw of the American crocodile is visible when its mouth is closed. Adult crocodiles are 7 to 15 feet long and weigh 150 to 450 pounds. Young crocodiles are 8 to 10 inches long when they hatch. There are approximately 500 to 800 American crocodiles in Florida. Crocodiles can reach 60 to 70 years of age.