After losing more than one CBB over the years, I now have a small one that is eating frzn and doing great. My last one before this lasted 3 days, just long enough to eat the tank full of aiptasia rocks that I had cultured on purpose for it in a 120g tank. It ate every aiptasia & died the next day
It's my wife's favourite fish (along with Porcupine puffer, Bannerfish, and Jellyfish) so I gave it one last try & I've had it almost a month and its doing really well in a well-stocked (mostly lps) seahorse refugium tank where it is the biggest fish. I now have specimens of all four of Irene's favourite fish, so she's happy about that.
But yeah, not a great survival rate & I think they are more likely to much on clams (since that's what some people feed them to keep alive - manila clams from the supermarket).
Anthony