I would include the jawfish. IMO they are th most interesting fish you can have. I have a tiger stripe (black cap) jawfish in my 24 gallon tank. He has burrowed under the edge of a rock and has build two little entrances and edged them with empty shells. He is rearranging and stacking the shells all of the time and is fun to watch. When other fish come around he will spit sand and small rubble at them! Very entertaining to watch.
