balaenoptera physalus(n = noun.animal) common rorqual, fin whale, finback, finback whale - large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific;
is a kind of razorback, rorqual
is a member of balaenoptera, genus balaenoptera

balaenoptera, balaenoptera acutorostrata, balaenoptera borealis, balaenoptera musculus, genus balaenoptera