Leviathan

I forget but, I think the monster was called the Leviathan. Question is:
If this is the front end...
And i runs through the caves to the other side...
What would that make this end?

Ew. Don't get too near it.

Well, if you're on a certain Strike Force, thats the eye socket.

I took a picture of it and turned it sideways (up and down like a slit)