Review,
------------------------------------
1-Overall nice idea/creativity.
2-Shading needs some work around the skin.
3-Make it so its not all blurry and hard to see, because at the moment this isn't that good till edit.
4-I suggest for the teeth to make them longer and too be sharper. Also with the blood it needs to be a better, Make it dripping off the top jaw of the teeth going down to the bottom jaw.
------------------------------------
(All my recommendations to your icon, you can choose to use these or not, your choice.)
Thanks, Army-of-pandas.
------------------------------------------------