an extremely huge whalebone whale (Balaenoptera musculus) having a bluish-gray back, yellowish underparts, and several ventral neck grooves. It's considered the largest lifestyle animal, occasionally achieving a length of 30.5 meters (100 legs). Also known as sulphur-bottom.
A whale (Balaenoptera musculus), blue in shade therefore the biggest known living animal.
biggest mammal ever before understood; bluish-grey migratory whalebone whale mainly of south hemisphere