In a desperate attempt to find some good-quality fish, white-fish trawler Ocean Venture has steamed 150 miles south of the Arctic Circle. Skipper John Buchan has taken a huge risk but it pays off as the crew haul in a huge load of red fish and Greenland halibut. Prawn trawler Amity, however, is not so lucky. They may have landed a big catch but it's of fish, not prawns. According to EU rules if Amity catches too many fish, the crew will have to throw them back.