What is Atlantic herring?
{{Speciesbox | name = Atlantic herring | image = Clupea harengus.png | status = LC | status_system = IUCN3.1 | taxon = Clupea harengus | authority = [[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]] | range_map =Clupeaharengusdistkils.jpg | range_map_caption = Distribution on a [[NASA]] [[SeaWIFS]] image }} The '''Atlantic herring''' (''Clupea harengus'') is a kind of [[herring]], a [[fish]]. It can be found on both sides of the [[Atlantic Ocean|Atlantic]]. It can grow up to 45cm in length, weighing more than half a kilogram. It is a swarm fish, meaning many fish come together and form a ''school'' (or [[swarm]]) of fish. Swarms of up to 4 cubic kilometers in size have been measured of ''atlantic herring'', with an eastimated 4 billion individual fish. Like with so many other fishes though, commercial overfishing is posing a problem. Stocks of herring have been collapsing. Their natural [[predator]]s are [[pinniped|seal]]s, [[cod]], other large fish as well as some kinds of [[whale]]s. The current reason for the overfishing is the need of the Omega Fatty Acid, which helps increase memory, and brain functions. [[Image:Heringsfass.JPG|thumb|240px|left|Clupea harengus]] == Baltic herring == The herrings that occurs in the [[Baltic Sea]] is much smaller. Some people consider it a distinct [[subspecies]]. They call it Baltic herring, ''C. harengus membras.''{{biology-stub}} [[Category:Clupeiformes]]