balaenoptera borealisとは意味:《動物》イワシクジラ◆ヒゲクジラの一種。ヒゲは大変細かい。17m 位。3~5頭の群れを形成。Sei Whale=Balaenoptera Borealis。 balaenoptera borealis meaning: Noun: Balaenoptera borealis Similar to but smaller than the finback whale - sei whale Type of: razorback , rorqual Part of: Balaenoptera , genus Balaenoptera Encyclopedia: Ba...