They're beautiful, but after trying this fish 3 different times and it ending the same way, I decided these are fish that are better off in the wild.
Really research Blue Spot Jawfish disease. It's basically like fin rot, only there's no cure, they just slowly wither away.
I've had all three of mine due this way. Each I had for quite a while, eating and acting healthy and then out of no where they'd get this. There's a lot if info about them and this issue on Wetwebmedia