Clupea Clupea Clupea is genus of planktivorous bony fish belonging to the family Clupeidae, commonly known as herrings. They are found in the shallow, temperate waters of the North Pacific and the North Atlantic oceans, including the Baltic Sea. Three species of "Clupea" are recognized. The main taxa, the Atlantic herring ("Clupea harengus") and the Pacific herring ("Clupea pallasii") may each be divided into subspecies. Herrings are forage fish moving in vast schools, coming in spring to the shores of Europe and America, where they form important commercial fisheries. The species of "Clupea" belong to the larger family Clupeidae (herrings, shads,
History of the North Sea the main action was not in the North Sea but rather the Atlantic. Also different from the first war, the North Sea was no longer the exclusive territory of the Allies. Rather, it was, above all in the first years of the war, the stage for an intensive coastal war, featuring mainly small vessels like submarines, minesweepers, and Fast Attack Craft. However, despite early successes, which brought about a supply crisis in Britain, the Germans did not succeed in breaking the British resistance. Like in the first war, the allies soon controlled the seas, especially due to air superiority and