This chap is a denizen of the San Diego Zoo, in California. This crocodile's smile reveals a nasty row of teeth. By the time he has reached old age, he will have gone through as many as 50 sets of them. Now, that keeps the tooth fairy very busy.
These members of the crocodilia order take pride in having survived for hundreds of millions of years in roughly the same form. Hey, if ugly works for you that well, keep it up.
Photo courtesy: Ashley.