High Quality Content by WIKIPEDIA articles! The pygmy right whale (Caperea marginata) is not a right whale at all but is instead a member of the cetotheres, a family of baleen whales, which until 2012 have been believed to be extinct; previously C. marginata was considered the sole member of the family Neobalaenidae. First described by John Edward Gray in 1846, it is the smallest of the baleen whales, ranging between 6 metres (20 ft) and 6.5 metres (21 ft) in length and 3,000 and 3,500 kg in mass. Despite its name, the pygmy right whale may have more in common with the gray whale and rorquals than the bowhead and right whales.