 Today, many sea fish, such as fresh herring, tuna, mackerel, salmon and sardines, are well established throughout the country.Prior to the industrial revolution and the ensuing pollution of the rivers, salmon were common in the rivers Rhine, Elbe, and Oder and only slowly started to return along with a growing consciousness for environmental questions and resulting measures, such as state-of-the-art sewage plants, reduction of agricultural deposits, et cetera.Fish fingers, known as Fischstäbchen (lit.