hungry grouper

No, but I have used a product called Silversides which to me are pretty much the same thing. I am not a nutrition expert, but I do see references to using smelts with success over on WWM, I think you might want to avoid sardines and anchovies (too mach fat)... main thing here is variety. Raw clams, squid, peeled shrimp are all good, as well as the various frozen labels like Lifeline, Formula, etc.