Deep scattering layer over Reykjanes Ridge and Irminger Sea

In recent years, Iceland has conducted several trawl-acoustic surveys in the Irminger Sea and adjacent waters. The target species for the investigations has been pelagic redfish (Sebastes mentella), but all specimens caught in the trawl have been measured and/or counted. In all the surveys, an extensive deep-scattering layer has been observed, mostly in between 300-800 m from the surface. In this paper we show distribution and composition of the deep-scattering layer, based on combined information since 1996.