balaenoptera acutorostrata(n = noun.animal) lesser rorqual, minke whale, piked whale - small finback of coastal waters of Atlantic and Pacific;
is a kind of razorback, rorqual
is a member of balaenoptera, genus balaenoptera

balaenoptera, balaenoptera borealis, balaenoptera musculus, balaenoptera physalus, genus balaenoptera