Let's be clear on Hawaii regs and its intent. It was nothing more than an environmental power grab by activists who drummed up bleeding heart support from Hawaii's ruling class. Assuming the price was not ludicrous I would have no problem buying a black market Hawaiin fish as none of the Hawaiin species popular in the hobby are even remotely endangered. As someone else pointed out it now allows locals to collect under "personal collection" and then "illegally" sell. And of course, locals are still free to catch and eat tangs and whatever else they want.
While certainly some areas of the world have been overfished should we ban all food collection of fish and require people only eat aquacultured? We have seen were that went with gross fish farms raising Tilapia and Salmon. Likewise, I only eat wild fish and shellfish. Many countries try to responsibly manage fishing, but some continue to plunder at will.
I for the most part will not buy aquacultured fish as most are poor quality/color compared to wild. If I do its probably only from ORA. A couple weeks ago I stopped by TSA and they had a tankful of freshly arrived, quarter sized, emaciated yellow tangs with no price and I didn't ask. All I could do is laugh at the thought of what the price actually was. I actually just looked online and they have an adult Hawaiin yellow tang for a mere $899. To be clear about aquaculture there are some I have no problems with like clowns, bangai's, dottybacks etc. For those (not just here) advocating only keeping aquacultured fish your fish selection is going to be really limited and for the most part very expensive. Think about that the next time you eat fish.