The fin whale (Balaenoptera physalus), also known as the finback whale or common rorqual, is a species of baleen whale and the second-longest cetacean after the blue whale. The biggest individual reportedly measured 26 m (85 ft) in length, with a maximum recorded weight of 77,000–81,000 kg (170,000–179,000 lb).

fin whale, (Balaenoptera physalus), a slender baleen whale, second in size to the blue whale and distinguishable by its asymmetrical coloration.

The northern fin whale (Balaenoptera physalus physalus) is a subspecies of fin whale that lives in the North Atlantic Ocean and North Pacific Ocean.