Experiment with pointing teeth in different directions to get a jagged, ferocious look. I decided there just weren't enough teeth, so I started to add them growing through the skin, out from the chin and sides of the jaw. While this is extreme, sometimes you'll see alligators with a tooth poking through their lip, so this is something that has a basis in nature. The tongue this time is more like a sweet potato or yam, rather than a flowing shape. Notice how the length, shape and frequency of the curves can give each tongue a very different feel.