than actively burrowing?
I noticed that even with the previous Jawfish I had, he would occasionally swim about the top of the tank, not just hang around his burrows (Opistognathus aurifrons seem to stay near their burrows much more than Opistognathus rosenblatti). There are really too many hiding places in the tank to get a fish out without completely dismantling the rock work. The Tusk doesn’t even seem interested in the Jawfish any longer. <...