| File:Tursiops truncatus head.jpg |
| Suborder Mysticeti (baleen whales): Eschrichtiidae (gray whales) - Balaenopteridae (rorquals) - Balaenidae (right whales) - Neobalaenidae (pygmy right whale) |
| Suborder Odontoceti (toothed whales): Platanistoidea (river dolphins) - Delphinidae (oceanic dolphins) - Phocoenidae (porpoises) - Monodontidae (beluga and narwhal) - Physeteridae (sperm whales) - Kogiidae (pygmy and dwarf sperm whales) - Ziphiidae (beaked whales) |
