BALTIC HERRING

Clupea harengus


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IUCN Red List Status: NOT EVALUATED

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BALTIC HERRING

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Clupea harengus Clupea harengus

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Description

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Some rights reserved

Many people will be familiar with the herring as, for many years, it has been a staple of the fishmonger's slab. It is a shoaling fish and has the classical fish shape, and is silvery and streamlined. It has a single dorsal fin, and pelvic fins positioned slightly in front of the line of the dorsal fin. The pectoral fins, like the others on the fish, are soft and not stiff and 'bony' like on many other fishes. The lower jaw protrudes forward of the upper lip, and there is no visible lateral line. The body is deeper than it is wide, improving the streamlining, and the tail is deeply forked. The colouring of the body overall is silver, but closer inspection reveals that there is a darker blue iridescence over the upper half of the body, whilst the underside is paler. This colouration is called 'countershading', and provides a way of camouflaging the fish from attacks by its many predators from all angles.