>> anthony: mark marhefka has been a fisherman since the '70s. he takes an unusual and much needed approach to catching fish. instead of raking the sea of the same overfished, mindlessly popular species, he passionately promotes the just as good and usually better, less known, and underutilized stuff. >> sean: one of the great things about the low country is the flavor of our waterways, and that wasn't being represented properly in all of the restaurants. then all of a sudden, i hear about this guy who has the most beautiful fish you've ever seen, but you got to go to the dock and get it. [ laughter ] >> anthony: frustrated by the conventional wisdom, by the mishandling of fish by other distributors, and the narrow range available on the market, he became his own dealer, starting abundant seafood, one of the country's first csfs or community supported fisheries. he's changed the way people think about so-called "trash fish." >> sean: look at how beautiful