Sometimes I think my fish eat better than I do.
The puffers & now the Niger Trigger (thanks again Justin) eat FD shrimp & krill, as well as tiger prawns, shore crabs, and even blue crabs (my wife just bought some for her Poofy from T&T market). The FD Krill works out to $30-40 a pound I think, which is far more than anything I pay for my own food. We also drive all the way to Tswassesen & other shoreline places to collect little crabs for them to munch on from under the rocks at low tide.
Yes, while these fish would probably prefer to be out in the wild, at least in our tanks, they are usually safe from predators and get breakfast in bed (so to speak).
Anthony