Gill arches from underneath

I'm very pleased with the way the underside of this head is coming along.  I like the thick, pebbly appearance of the neck skin and the way it blends in to the underside of the jaw, as well as how it contrasts with the gill arches.  The jaw isn't finished, as you can probably tell.  It needs a lot more texture and it needs to be properly blended into the neck.

Then, of course, I'll need to take a look at the mouth.  I'm kind of avoiding the mouth, because I have to re-paint it and I'm not entirely sure how I want to do that.