Fauna of Europe of the Baltic Sea has led to the evolution of many slightly divergent species, such as the Baltic Sea herring, which is a smaller variant of the Atlantic herring. The most frequent benthic species are "Saduria entomon" and "Monoporeia affinis", which is originally a freshwater species. A great part of its bottom is anoxic and without animal life. The Baltic Sea and North Sea are also home to a variety of marine mammals (common seals, grey seals). Europe contains several important freshwater ecoregions, including the heavily developed rivers of Europe, the rivers of Russia, which flow into the Arctic, Baltic,
Book of the Consulate of the Sea of the Ribera (seaside), which in 1282 were named "consols de mar" ("consuls of sea"). Many authors believe that the laws specified in the "Book of the Consulate of the Sea" had a big influence on all other compilations of maritime law in Europe, which are partly based on it. Some of these laws specified in the "Book of the Consulate of the Sea" were already adopted in the ninth century in places like the Baltic, the North Sea, the Schleswig sea: Riga, Wisby, Hamburg, Lübeck and other cities of the Hanseatic League, being published since 1407 under the title