Wikipedia
Steckerlfisch ("steckerl" means "small stick" or "pole" in the Bavarian dialect) is a fish grilled on a stick in the traditional way of a fisherman or camper. It is considered a speciality of Austria, Bavaria, and Franconia. The dish is commonly served in beer garden and on folk festivals and has nothing to do with the dried Stockfish.
Traditionally it is prepared from local fish like coregonus or whitefish like common bream but nowadays fish breeds like trout, fingerling or mackerel are also used.
Steckerlfisch is a very popular meal at the Munich Oktoberfest. It was the Oktoberfest which made the dish popular. A local fish merchant introduced Steckerlfisch to the fair in the early part of the 20th century. Soon it was a hit.