Study the inside of a snakes mouth for reference, you will see that they have a small amount of teeth and that they are small teeth accept for the two fangs.

And even if you are saying that this snake is a fictitious representation it still needs to be based in reality to help the viewer believe in your character.

Most people have seen a snake in one form or another and they usually think about the two fangs that snakes have.

So keep going at it, and you'll get it.

Cheers.