Cuvier's beaked whale, goose-beaked whale, or ziphius (Ziphius cavirostris) is the most widely distributed of all beaked whales in the family Ziphiidae. It is among the largest beaked whales but smaller than most baleen whales, reaching lengths of about 4.5-7 m (15 to 23 ft) and weights of 1,800-3,100 kg (4,000 to 6,800 lb).

This species is pelagic,