Size diversity aside, I think one of the best arguments for restricting commercial harvest to terminal areas is that all the fish in a terminal area are as large as they're going to get, and that's more dollars per fish. You'd think that would be an exciting prospect for the commercial market, but like Keta (a former trawler) explained to me in another thread yesterday, the status quo assures the commercial processors a maximum harvest level, and they're generally disinterested in setting any new precedents that might change that.