The blue whale (Balaenoptera musculus), which belongs to group of baleen whales, is the largest of all organisms living on the Earth. It can grow up to a length of 32 m and weigh around 200 tons. While it is predominantly indigo in color, the shade can vary from dark azure to slate. It has three subspecies: Balaenoptera musculus musculus, Balaenoptera musculus intermedia, and Balaenoptera musculus brevicauda.