I have been wanting a pearly jawfish for a long time now. My question for you all is, do they cover your tank in sand? By that I mean, I had an eyelash goby that waved its tail into the sand and buried nearly all corals that sat on my sand bed and my tank was constantly cloudy. It was a huge mistake adding the eyelash goby and I want to make sure the same thing isnt going to happen with the pearly jaw. I do have a yellow watchman that sifts the sand through its gills onto some corals but that is not problem like this other fish was.