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,
Geography of the European Union the dichotomy between highland and mountainous Southern Europe and a vast, partially underwater, northern plain ranging from United Kingdom in the west to Poland in the east. These two halves are separated by the mountain chains of Pyrenees and Alps/Carpathians. The northern plains are delimited in the west by the Scandinavian mountains and the mountainous parts of the British Isles. Major shallow water bodies submerging parts of the northern plains are the Celtic Sea, the North Sea, the Baltic Sea complex, and the Barents Sea. The northern plain contains the old geological continent of Baltica, and so may be regarded