On a recent trip to our zoo, I toured the Amazing Amphibian display (because it was raining cats and frogs outside and the display was inside). Amoung the frogs and salamanders was a creature which looked like a very large worm, a very large worm which had teeth! It is called a Caecilian. They are native to the tropics and live underground. An interesting fact: the young eat the skin of the mother!
References:
http://en.wikipedia.org/wiki/Caecilian and
http://http://news.bbc.co.uk/2/hi/sc...re/7235205.stm