This was done for Chris Buzelli's class- the assignment was a nod to Jacob Covey's "Beasts" compilation and I chose the Leviathan. Although there are many different versions of this beast out there I chose the apparently christian one of it being some sort of underwater gate to hell.
Final first (ca 28x20 in/click to enlarge things):
The whole things is poster size and so even this sketch was huge:
Then I started tracing over it in photoshop:
I was experimenting with colored lines in this rather than just black ink+color fills
Details along the way: