What is the smallest dolphin species?

There is not really one smallest species. The smallest species include:

True dolphins (Delphinidae):

  • Tucuxi (Sotalia fluviatilis) – 1.3 to 1.8 m
  • Hector's dolphin (Cephalorhynchus hectori) – 1.2 to 1.5 m
  • Black dolphin (Cephalorhynchus eutropia) – 1.2 to 1.7 m
  • Commerson's dolphin (Cephalorhynchus commersonii) – 1.3 to 1.7 m

River dolphins (Platanistidae):

  • Franciscana (Pontoporia blainvillei) – 1.3 to 1.7 m

Porpoises (Phocoenidae):

  • Vaquita (Phocoena sinus) – 1.2 to 1.5 m
  • Finless porpoise (Neophocaena phocaenoides) – 1.2 to 1.9 m
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