In Central Europe, it is a traditional part of a Christmas Eve dinner. Hungarian fisherman's soup, a specially prepared fish soup of carp alone or mixed with other freshwater fish, is part of the traditional meal for Christmas Eve in Hungary along with stuffed cabbage and poppy seed roll and walnut roll. A traditional Czech Christmas Eve dinner is a thick soup of carp's head and offal, fried carp meat (sometimes the meat is skinned and baked instead) with potato salad or boiled carp in black sauce. In some Czech families, the carp is not killed, but after Christmas returned to a river or pond, however, this practice is officially discouraged, as the carp may still perish as a result of stress and low fat reserves. Another common practice involves buying a live carp and keeping it in a bathtub for a while before slaughtering it before the dinner - this is supposedly meant to reduce muddy taste, but is also discouraged, as unprofessional slaughter may cause unnecessarry suffering to the carp or even injury to the person performing it, this is also a source of many jokes and comedy scenes in movies, commercials etc.) A Slovak Christmas Eve dinner is quite similar, with soup varying according to the region and fried carp as the main dish. Also in Austria, parts of Germany and Poland, a fried carp is one of the traditional dishes on Christmas Eve.