Cetaceans are aquatic mammals constituting the infraorder Cetacea. There are around 89 living species, which are divided into two parvorders. The first is the Odontoceti, the toothed whales, which consist of around 70 species, including the dolphin, porpoise, beluga whale, narwhal, sperm whale, and beaked whale

Scientific name: Cetacea

Order: Artiodactyla

Class: Mammalia

Kingdom: Animalia

Length: Southern right whale: 14 m, North Atlantic right whale: 14 m, more

Mass: Southern right whale: 23,000 kg, North Atlantic right whale: 40,000 – 70,000 kg