How do you tell an alligator from a crocodile?

Search: crocodile alligator

Why: There is one (but I don't know which) floating in the water at the beginning Deliverance / Blair Witch Project part of Pirates of the Caribbean.

Answer: In list form:

Alligator

• Snout is wide and U-shaped
• Wide upper jaw; when its mouth is closed, the teeth in the lower jaw fit into sockets of the upper jaw, hidden from view
• Appear blackish
• Prefer freshwater, with low tolerance for salt water
• Averages about 14 feet in length
• Make nests of vegetation near freshwater
• Found in the southeastern United States, including South Florida

Crocodile

• Snout is long, narrow, and V-shaped
• Upper and lower jaws are nearly the same width; when mouth is closed, the teeth are exposed all along the jaw line in an interlocking pattern
• Light olivey-brown
• Prefer brackish water, and sometimes even ocean
• Grow to more than 19 feet in length
• Lay eggs in mud or sand near brackish water
• Live in the Caribbean, Central America, South America, and South Florida - the only place in the US
  

Source: WiseGeek

The More You Know: That one in the ride is a crocodile then, huh, since it's Pirates of the Caribbean. I feel like Veronica Mars.