TV reporter Del Cooper is sea fishing for mackerel. As a hobby, it is generally considered a summer fishery as schools of mackerel overwinter in deeper waters and return to British shores from spring. Bait varies from shiny lures to feathers and chopped mackerel or fish. The Atlantic mackerel is also called Boston, Norwegian or Scottish mackerel. Hardly surprising to know then that a commercial mackerel war raged quietly over North Atlantic stocks and quotas.