Danish fishing vessel Kingfisher (HM555 ) in port at Thyborøn, Denmark. Kingfisher is a bottom trawler and is heavily dependent on North Sea cod, a stock that has historically been heavily overfished. The vessel is part of the Danish tradable quota system that favours larger vessels, at the expense of the low impact small-scale fleet. Concentration of quota in Danish fisheries has resulted in the fact that 105 vessels, representing only 15% of the fleet, catch 90% of the fish.