The taxonomy of these aquatic mammals follows:
Taxonomy ORDER CETACEA Suborder Mysticeti Family Eschrichtiidae: Gray Whale Family Balaenopteridae: rorquals Family Balaenidae right whales Family Neobalaenidae: Pygmy Right Whale Suborder Odontoceti Family Platanistoidae: river dolphins Family Delphinidae: oceanic dolphins Family Phocoenidae: porpoises Family Monodontidae Beluga, Delphinapterus leucas Narwhal, Monodon monoceros Family Physeteridae: Sperm Whale Family Kogiidae: Pygmy Sperm Whale and Dwarf Sperm Whale Family Ziphiidae: beaked whales