There is also a herring which frequents only the southern half of the Caspian, not passing over the shallow part of the sea which extends from Baku eastwards.
Pilseir is adapted from Eng.), Clupea pilchardus, a fish of the herring family (Clupeidae), abundant in the Mediterranean and on the Atlantic coasts of Europe, north to the English Channel.
The herring of the American side of the Atlantic is specifically identical with that of Europe.
They are rich in sea-fowl, the most common being the eider duck, puffin, Manx shearwater, black guillemot, kittiwake and herring gull.
In the Baltic, where the water is gradually losing its saline constituents, thus becoming less adapted for the development of marine species, the herring continues to exist in large numbers, but as a dwarfed form, not growing either to the size or to the condition of the North-Sea herring.
But no other species equals the common herring in importance as an article of food or commerce.
During the 16th, 17th and 18th centuries Minehead had a considerable coastwise trade in wool, grain and wine, but began to decline owing to the migration of the woollen industry to the north of England, and to the decay of the herring fishery.
Every one knows that by the peculiar cunning of their gills, the finny tribes in general breathe the air which at all times is combined with the element in which they swim; hence, a herring or a cod might live a century, and never once raise its head above the surface.
Later on appears the Caspian herring (Clupea caspia), which formerly was neglected, but has now become more important than sturgeon; the sturgeon A.
Formerly it was the general belief that the herring inhabits the open ocean close to the Arctic Circle, and that it migrates at certain seasons towards the northern coasts of Europe and America.