Most known species are â '' because they fished Antarctic krill ( Euphausia superba ) , Pacific krill ( Euphausia pacifica ) and Northern krill ( Meganyctiphanes norvegica ) . Well-known species of the Euphausiidae of commercial krill fisheries include Antarctic krill ( Euphausia superba ) , Pacific krill ( Euphausia pacifica ) and Northern krill ( Meganyctiphanes norvegica ) .