Speaking from experience, jawfish can be problematic. If you have a DSB, they dig like mad and can release all sorts of junk from the DSB. They also make a mess of sandbed corals. I have a yellowhead that's killed frags he used to make a burrow, killed corals he has burried, and he has stirred up the DSB so much my tank had gotten totally out of whack a few times. I'm not a fan lol, so just wanted to pass that info before any headaches happened.