We didn't spy any reptiles on our last stop, but we did see of one of the Florida Keys' neatest animals, the Key deer. Since the Keys is the only place you'll see this sub-species of deer it's worth seeking them out while you're traveling through.

The first written record of Key deer is in the writing of a Spanish sailor Hernando de Escalante Fontaneda who was shipped wrecked and captured by Native Americans in the Keys in 1550.
The deer were heavily hunted until the practice was banned in 1939, but the population continued to decline, due to poaching and the destruction of their habitat, until the 1950's where it became nearly extinct. The National Key Deer Refuge was established in 1953. This habitat consists of over 8500 acres on Big Pine, No Name Key and several smaller uninhabited Keys. The Key deer also became one of the first animals to be protected by the Endangered Species act in 1973. The population, still endangered, is now estimated between 300 and 800, and though the deer seem to be thriving at this time there is still great concern for the future of these animals due to continued development and increased traffic down Route One. About one half of today's Key deer fatalities are due to car strikes.
The abundance of fresh water makes the blue hole a great place to spot a Key deer, so drive slowly on over and check it out. Don't forget, there are many other types of wildlife to see as well... fish, birds, turtles, and yes alligators!
Stop and enjoy the Blue Hole, you'll be glad you did.
Click this link for a great panoramic view of the Blue hole:
Sources: http://floridakeystreasures.com/creatures/keydeer/keydeer1.shtml; http://en.wikipedia.org/wiki/Key_deer