The snail is the animal with the most teeth in the world. Although its mouth is about the size of the tip of a pin, it has 25,600 teeth! In the middle of the snail's little tentacles a little down there is a small hole, this is its mouth, there is a jagged tongue, scientists call "tongue". The surface of the tongue is like a filing board for grating ginger, with a number of small, horny teeth neatly arranged. When the snail eats, it uses this "small file" to grind the leaves of the plant and then eats them little by little. Although its teeth are very small, the naked eye can not be seen, but it is very powerful, even if you put the snail into a harder than its body in a cardboard box, it can bite through the cardboard to climb out.