Jaw fish are great for plowing through the sand and borrowing. I just wanna point out something very important that some fail to do. Not saying you but it has been done. Make sure you ad all your rock work and it's very stable. Then add all your sand. If your gonna add a jawfish a 4" sand bed will do fine. I have a jawfish and he digs and digs and borrows and borrows all over my tank! It's really cool to watch. He finds a spot and just sticks his head out and watches you lol. So cool.
"When creating an aqua scape, strive for the beauty of imperfection, as its art and there is no wrong or right, it's left open for interpretation" James Findley