Smallest cetacean

The smallest cetacean (the group containing whales, dolphins and porpoises) is the vaquita (Phocoena sinus), endemic solely to the Gulf of California, off Baja California, Mexico. Adults reach a maximum length of only 1.2 m (3 ft 11 in) and typically weigh between 45 and 50 kg (99-110 lb). Critically endangered, with an estimated wild population of just 10 to 20 remaining, they are also the rarest cetacean.

Only slightly larger on average is the Hector's dolphin (Cephalorhynchus hectori), endemic to New Zealand. The black dolphin (C. eutropia) and finless porpoise (Neophocaena phocaenides) are also among the world's smallest cetaceans.