Thousands of people lined the banks of the biggest pond in the Czech Republi c on Friday to watch fishermen in dark green waterproof gear wade into the frigid water and slowly scoop up carp with their nets. The fishermen were acting out a centuries-old tradition as they hauled their catch from the Rozmberk Pond — mostly carp that will end up on the tables of families across the country at Christmas. Czechs consider carp a delicacy and many can hardly imagine the festive season without it.