poor thing....I have tried 3 BSJF. First one lived for over 6months before wedging himself above the waterline on top of my tunze wavebox. Next one got the same look as yours after a few months of doing decent. Do the white splotches look like all color pigment has left the affected area ? I 'm afraid he is a gonner, looks pretty well set-in. I did bring one BSJF from looking like that back to healthy, but it only had one white spot area. I treated it with primaflex and milaflex (sp?) in a hospital tank immediately. After a few weeks, the fish's skin improved dramatically, so I introduced her to the main display where she died within a few weeks. I should have kept her in hospital tank longer. My 3rd BSJF jumped when I forgot to close my glass top.