The fish on your plate: does anyone know where it comes from?

It is another busy Friday afternoon at Makola Market. Gifty Gyan, a civil servant, is making a quick stop to buy fish before heading home for the weekend. She picks up smoked mackerel and a piece of tuna, smells them, negotiates briefly with the vendor, and places them in her tote bag. But Gifty does not ask where the fish was caught, who caught it, or whether the vessel that hauled it from the sea was even operating legally.