An Alligator
An alligator lies so low in the water that it's hidden like a submarine. Its eyes, ears and nostrils all lie on the top of its head, so that it can still see, hear and smell things while most of its body is under the water. Other animals don't even know it's there - until it grabs them!
* It's easy to tell an alligator from a crocodile. if all the bottom teeth are tucked inside the mouth, its an alligator. if the fourth bottom tooth stick out, it's a croc.
