Herring of the Atlantic Ocean, Clupea harengus, is perhaps the oldest staple food of Europe and is still important to date. Already during the early Middle Ages it was salted and smoked, which enabled transport and trade across the continent. An important representative of the European pelagic biomass. During the whole year the various stocks have their spawning time in different periods. The meat is delicate yet distinctive in taste. It is rich in omega 3 acids.