# List of cetaceans

Cetacea is an infraorder that comprises the 94 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other in the Eocene some 50 million years ago (mya). Cetaceans are descended from land-dwelling hoofed mammals, and the now extinct archaeocetes represent the several transitional phases from terrestrial to completely aquatic. Historically, cetaceans were thought to have descended from the wolf-like mesonychians, but cladistic analyses confirm their placement with even-toed ungulates in the order Cetartiodactyla.
Whale populations were drastically reduced in the 20th century from intensive whaling, which led to a moratorium on hunting by the International Whaling Commission in 1982. Smaller cetaceans are at risk of accidentally getting caught by fishing vessels using, namely, seine fishing, drift netting, or gill netting operations.

## Conventions

The following is a list of currently existing (or, in the jargon of taxonomy) 'extant' species of the infraorder cetacea (for extinct cetacean species, see the list of extinct cetaceans). The list is organized taxonomically into parvorders, superfamilies when applicable, families, subfamilies when applicable, genus, and then species. In tabular form, seven descriptors are given for each species: the common name; the scientific name; the IUCN Red List status; a global population estimate; a global map with its range; its weight with an image of its shape, and its size relative to a human; and a photograph.
Conservation status codes listed follow the IUCN Red List of Threatened Species (v. 2014.3; data current at 20 January 2015).
Where available, the global population estimate has been listed. When not cited or footnoted differently, these are from the IUCN Red List of Threatened Species (v. 2014.3; data current at 20 January 2015).

## Mysticeti: baleen whales

The baleen whales, also called whalebone whales or great whales, form the parvorder Mysticeti. Baleen whales are characterized by having baleen plates for filter feeding and two blowholes.

### Family Balaenidae: right whales

The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
| Genus Balaena Linnaeus, 1758 – one species |
| Common name | Scientific name | IUCN Red List status | Global population estimate | Range | Size | Picture |
| Bowhead whale | Balaena mysticetus Linnaeus, 1758 | LC | 10,000 | | 60 t (66 short tons) | |
| Genus Eubalaena Gray, 1864 – three species |
| Common name | Scientific name | IUCN Red List status | Global population estimate | Range | Size | Picture |
| North Atlantic right whale | Eubalaena glacialis Müller, 1776 | CR | 350 | | 40–80 t (44–88 short tons) | |
| North Pacific right whale | Eubalaena japonica Lacépède, 1818 | EN | 404–2,108 | | 60–80 t (66–88 short tons) | |
| Southern right whale | Eubalaena australis Desmoulins, 1822 | LC | 13,600 | | 40–80 t (44–88 short tons) | |

### Family Balaenopteridae: rorquals

Rorquals are the largest group of baleen whales, with eleven species in three genera. They include the largest animal that has ever lived, the blue whale. They take their name from a Norwegian word meaning "furrow whale"; all members of the family have a series of longitudinal folds of skin running from below the mouth back to the navel (except the sei whale, which has shorter grooves). They allow the mouth to expand immensely when feeding. All rorquals have these unique folds.
| Subfamily Balaenopteridae – one genus, nine species |
| Genus Balaenoptera – nine species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Blue whale | Balaenoptera musculus Linnaeus, 1758 | EN | 5,000–15,000 | | 50–150 t (55–165 short tons) | |
| Bryde's whale | Balaenoptera brydei Olsen, 1913 | LC | 90,000–100,000 | | 14–30 t (15–33 short tons) | |
| Eden's whale | Balaenoptera edeni Anderson, 1879 | LC | Unknown | | Unknown | |
| Common minke whale | Balaenoptera acutorostrata Lacépède, 1804 | LC | 200,000 | | 2–4 t (2.2–4.4 short tons) | |
| Rice's whale | Balaenoptera ricei Rosel et al., 2021 | CR | 30–100 | | ~13.9 t (15.3 short tons) | |
| Fin whale | Balaenoptera physalus Linnaeus, 1758 | VU | 100,000 | | 30–80 t (33–88 short tons) | |
| Omura's whale | Balaenoptera omurai Wada et al., 2003 | DD | Unknown | Unknown | Unknown | |
| Sei whale | Balaenoptera borealis Lesson, 1828 | EN | 80,000 | | 20–25 t (22–28 short tons) | |
| Antarctic minke whale | Balaenoptera bonaerensis Burmeister, 1867 | NT | 515,000 | | 6–10 t (6.6–11.0 short tons) | |
| Genus Megaptera Gray, 1846 – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Humpback whale | Megaptera novaeangliae Borowski, 1781 | LC | 84,000 | | 25–30 t (28–33 short tons) | |
| Genus Eschrichtius Gray, 1864 – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Gray whale | Eschrichtius robustus Lilljeborg, 1861 | LC | 21,000 | | 15–40 t (17–44 short tons) | |

### Family Cetotheriidae: pygmy right whale

The pygmy right whale shares several characteristics with the right whales, with the exception of having a dorsal fin. Also, pygmy right whales' heads are no more than one quarter the size of their bodies, whereas the right whales' heads are about one-third the size of their bodies. The pygmy right whale is the only extant member of its family.
| Genus Caperea Gray, 1864 – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Pygmy right whale | Caperea marginata Gray, 1846 | LC | Unknown | | 3–3.5 t (3.3–3.9 short tons) | |

## Odontoceti: toothed whales

The toothed whales (parvorder Odontoceti), as the name suggests, are characterized by having teeth (rather than baleen). Toothed whales are active hunters, feeding on fish, squid, and in some cases other marine mammals.

### Family Delphinidae: oceanic dolphins

Oceanic dolphins are the members of the family Delphinidae. As the name implies, they tend to be found in the open seas, unlike the river dolphins, although a few species such as the Irrawaddy dolphin are coastal or riverine.
The Delphinidae are characterized by having distinct beaks (unlike the Phocoenidae), two or more fused cervical vertebrae and 20 or more pairs of teeth in their upper jaws. None is more than 4 m long.
| Genus Cephalorhynchus Gray, 1846 – four species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Chilean dolphin | Cephalorhynchus eutropia Gray, 1846 | NT | Unknown | | 60 kg (130 lb) | |
| Commerson's dolphin | Cephalorhynchus commersonii Lacépède, 1804 | LC | 22,000 | | 35–60 kg (77–132 lb) | |
| Heaviside's dolphin | Cephalorhynchus heavisidii Gray, 1828 | NT | Unknown | | 40–75 kg (88–165 lb) | |
| Hector's dolphin | Cephalorhynchus hectori Van Beneden, 1881 | EN (subspecies Maui dolphin CR) | 7,381 (subspecies Maui dolphin 57–75 in 2016) | | 35–60 kg (77–132 lb) | |
| Genus Delphinus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Common dolphin | Delphinus delphis Linnaeus, 1758 | LC | Unknown | | 70–150 kg (150–330 lb) | |
| Genus Feresa – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Pygmy killer whale | Feresa attenuata Gray, 1875 | LC | Unknown | | 160–350 kg (350–770 lb) | |
| Genus Globicephala – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Long-finned pilot whale | Globicephala melas Traill, 1809 | LC | Unknown | (green) | 1.8–3.5 t (2.0–3.9 short tons) | |
| Short-finned pilot whale | Globicephala macrorhynchus Gray, 1846 | LC | Unknown | (dark blue) | 1–4 t (1.1–4.4 short tons) | |
| Genus Grampus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Risso's dolphin | Grampus griseus G. Cuvier, 1812 | LC | Unknown | | 300 kg (660 lb) | |
| Genus Lagenodelphis – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Fraser's dolphin | Lagenodelphis hosei Fraser, 1956 | LC | Unknown | | 209 kg (461 lb) | |
| Genus Lagenorhynchus Gray, 1846 – six species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| White-beaked dolphin | Lagenorhynchus albirostris Gray, 1846 | LC | 100,000 | | 180 kg (400 lb) | |
| Atlantic white-sided dolphin | Lagenorhynchus acutus Gray, 1828 | LC | 200,000–300,000 | | 235 kg (518 lb) | |
| Dusky dolphin | Lagenorhynchus obscurus Gray, 1828 | LC | Unknown | | 100 kg (220 lb) | |
| Hourglass dolphin | Lagenorhynchus cruciger Quoy & Gaimard, 1824 | LC | 140,000 | | 90–120 kg (200–260 lb) | |
| Pacific white-sided dolphin | Lagenorhynchus obliquidens Gill, 1865 | LC | 1,000,000 | | 85–150 kg (187–331 lb) | |
| Peale's dolphin | Lagenorhynchus australis Peale, 1848 | LC | Unknown | | 115 kg (254 lb) | |
| Genus Lissodelphis – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Northern right whale dolphin | Lissodelphis borealis Peale, 1848 | LC | 400,000 | | 115 kg (254 lb) | |
| Southern right whale dolphin | Lissodelphis peronii Lacépède, 1804 | LC | Unknown | | 60–100 kg (130–220 lb) | |
| Genus Orcaella Gray, 1866 – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Australian snubfin dolphin | Orcaella heinsohni Beasley, Robertson & Arnold, 2005 | VU | 9,000–10,000 | | 130–145 kg (287–320 lb) | |
| Irrawaddy dolphin | Orcaella brevirostris Gray, 1866 | EN | 78–102 | | 130 kg (290 lb) | |
| Genus Orcinus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Orca | Orcinus orca Linnaeus, 1758 | DD | 100,000 | | 4.5 t (5.0 short tons) | |
| Genus Peponocephala – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Melon-headed whale | Peponocephala electra Gray, 1846 | LC | Unknown | | 225 kg (496 lb) | |
| Genus Pseudorca – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| False killer whale | Pseudorca crassidens Owen, 1846 | NT | Unknown | | 1.5–2 t (1.7–2.2 short tons) | |
| Genus Sousa – four species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Atlantic humpback dolphin | Sousa teuszii Kükenthal, 1892 | CR | 1,500 | | 100–150 kg (220–330 lb) | |
| Australian humpback dolphin | Sousa sahulensis Jefferson & Rosenbaum, 2014 | VU | 10,000 | | 230–250 kg (510–550 lb) | |
| Indian Ocean humpback dolphin | Sousa plumbea Cuvier, 1829 | EN | Unknown | | | |
| Indo-Pacific humpback dolphin | Sousa chinensis Osbeck, 1765 | VU | Unknown | | 250–280 kg (550–620 lb) | |
| Genus Sotalia – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Guiana dolphin | Sotalia guianensis Bénéden, 1864 | NT | Unknown | | 35–45 kg (77–99 lb) | |
| Tucuxi | Sotalia fluviatilis Gervais & Deville, 1853 | EN | Unknown | | 35–45 kg (77–99 lb) | |
| Genus Stenella Gray, 1866 – five species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Atlantic spotted dolphin | Stenella frontalis Cuvier, 1829 | LC | 100,000 | | 100 kg | |
| Clymene dolphin | Stenella clymene Gray, 1846 | LC | Unknown | | 75–80 kg (165–176 lb) | |
| Pantropical spotted dolphin | Stenella attenuata Gray, 1846 | LC | 3,000,000 | | 100 kg (220 lb) | |
| Spinner dolphin | Stenella longirostris Gray, 1828 | LC | Unknown | | 90 kg (200 lb) | |
| Striped dolphin | Stenella coeruleoalba Meyen, 1833 | LC | 2,000,000 | | 100 kg (220 lb) | |
| Genus Steno – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Rough-toothed dolphin | Steno bredanensis Lesson, 1828 | LC | 150,000 | | 100–135 kg (220–298 lb) | |
| Genus Tursiops – three species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Common bottlenose dolphin | Tursiops truncatus Montagu, 1821 | LC | 600,000 | | 150–650 kg (330–1,430 lb) | |
| Indo-Pacific bottlenose dolphin | Tursiops aduncus Ehrenberg, 1833 | NT | Unknown | | 230 kg (510 lb) | |
| Tamanend's bottlenose dolphin | Tursiops erebennus Cope, 1865 | NE | Unknown | Unknown | Unknown | |

### Family Iniidae: river dolphins

This family contains one genus with two species.
| Genus Inia – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Amazon river dolphin | Inia geoffrensis Blainville, 1817 | EN | Unknown | | 150 kg (330 lb) | |
| Araguaian river dolphin | Inia araguaiaensis Hrbek, Da Silva, Dutra, Farias, 2014 | NE | Unknown | Araguaian river dolphin in blue | 150 kg (330 lb) | |

### Family Kogiidae: dwarf and pygmy sperm whales

The dwarf and pygmy sperm whales resemble sperm whales, but are far smaller. They have blunt, squarish heads with narrow, underslung jaws; the flippers are set far forward, close to the head and their dorsal fins are set far back down the body.
| Genus Kogia – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Dwarf sperm whale | Kogia sima Owen, 1866 | LC | Unknown | | 250 kg (550 lb) | |
| Pygmy sperm whale | Kogia breviceps Blainville, 1838 | LC | Unknown | | 400 kg (880 lb) | |

### Family Lipotidae: baiji

The family Lipotidae contains only the baiji. DNA evidence suggests it separated from oceanic dolphins about 25 million years ago. The species was declared functionally extinct in 2006 after an expedition to estimate the population found none.
| Genus Lipotes – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Baiji | Lipotes vexillifer Miller, 1918 | CR | 0–13 | | 130 kg (290 lb) | |

### Family Monodontidae: narwhal and beluga

The Monodontidae lack dorsal fins, which have been replaced by tough, fibrous ridges just behind the midpoints of their bodies and are probably an adaptation to swimming under ice, as both do in their Arctic habitat. The flippers are small, rounded and tend to curl up at the ends in adulthood. All, or almost all, the cervical vertebrae are unfused, allowing their heads to be turned independently of their bodies.
| Genus Delphinapterus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Beluga | Delphinapterus leucas Pallas, 1776 | LC | 136,000 | | 1.5 t (1.7 short tons) | |
| Genus Monodon – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Narwhal | Monodon monoceros Linnaeus, 1758 | LC | 123,000 | | 900–1,500 kg (2,000–3,300 lb) | |

### Family Phocoenidae: porpoises

Porpoises are small cetaceans of the family Phocoenidae. They are distinct from dolphins, although the word "porpoise" has been used to refer to any small dolphin, especially by sailors and fishermen. The most obvious visible differences between the two groups are that porpoises have a less pronounced beak, and have spade-shaped teeth as opposed to conical.
Porpoises, divided into seven species, live in all oceans. They span from species that live almost exclusively coastal and in rivers (finless porpoises) to species that are entirely oceanic (spectacled porpoise).
| Genus Neophocaena – two or three species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Indo-Pacific finless porpoise | Neophocaena phocaenoides Cuvier, 1829 | VU | Unknown | | 30–45 kg (66–99 lb) | |
| Yangtze finless porpoise | Neophocaena asiaeorientalisCuvier, 1829 | EN (subspecies Yangtze finless porpoise CR) | Unknown (subspecies Yangtze finless porpoise 1,012 in 2018) | | 30–45 kg (66–99 lb) | |
| Genus Phocoena – four species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Burmeister's porpoise | Phocoena spinipinnisBurmeister, 1865 | NT | Unknown | | 50–75 kg (110–165 lb) | |
| Harbour porpoise | Phocoena phocoenaLinnaeus, 1758 | LC | 700,000 | | 75 kg (165 lb) | |
| Spectacled porpoise | Phocoena dioptricaLahille, 1912 | LC | Unknown | | 60–84 kg (132–185 lb) | |
| Vaquita | Phocoena sinusNorris & McFarland, 1958 | CR | 12 | | 50 kg (110 lb) | |
| Genus Phocoenoides – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Dall's porpoise | Phocoenoides dalliTrue, 1885 | LC | 1,100,000 | | 130–200 kg (290–440 lb) | |

### Family Physeteridae: sperm whale

The sperm whale characteristically has a large, squarish head one-third the length of its body; the blowhole is slightly to the left hand side; the skin is usually wrinkled; and it has no teeth on the upper jaw.
| Genus Physeter – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Sperm whale | Physeter macrocephalus Linnaeus, 1758 | VU | 200,000–2,000,000 | | 25–50 t (28–55 short tons) | |

### Family Platanistidae: South Asian river dolphins

The Platanistidae were originally thought to hold only one species (the South Asian river dolphin), but, based on differences in skull structure, vertebrae and lipid composition, it was split into two separate species in the early 1970s, before being demoted back to subspecies in 1988. However, more recent studies support them being distinct species.
| Genus Platanista – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Ganges river dolphin | Platanista gangetica (Lebeck, 1801) | EN | 3,500 | (orange) | 200 kg (440 lb) | |
| Indus river dolphin | Platanista minor Owen, 1853 | EN | 1,450 | (blue) | 200 kg (440 lb) | |

### Family Pontoporiidae: La Plata dolphin

The La Plata dolphin is the only species of the family Pontoporiidae and genus Pontoporia. These dolphins are known for their long beak in relation to their relatively small body size. They have a small geographic range and are mainly found in the waters along the east coast of South America. La Plata dolphins are exclusively marine organisms, however, they are grouped with river dolphins due to the fact that they reside in the La Plata River which is a salt-water estuary. With their white or sometimes pale brown coloration, fishermen tend to call them "the white ghost", as they also tend to stray away from any human interaction.
| Genus Pontoporia – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| La Plata dolphin | Pontoporia blainvillei Gervais & d'Orbigny, 1844 | VU | 4,000–4,500 | | 50 kg (110 lb) | |

### Family Ziphiidae: beaked whales

A beaked whale is any of at least 22 species of whale in the family Ziphiidae. Several species have only been described in the last two decades. Six genera have been identified.
They possess a unique feeding mechanism among cetaceans known as suction feeding. They are characterized by having a lower jaw that extends at least to the tip of the upper jaw, a shallow or non-existent notch between the tail flukes, a dorsal fin set far backwards, three of four fused neck vertebrae, extensive skull asymmetry and two conspicuous throat grooves forming a 'V' pattern (which aid in sucking).
| Genus Berardius – three species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Arnoux's beaked whale | Berardius arnuxii Duvernoy, 1851 | LC | Unknown | | 8 t (8.8 short tons) | |
| Baird's beaked whale | Berardius bairdii Stejneger, 1883 | LC | Unknown | | 12 t (13 short tons) | |
| Sato's beaked whale | Berardius minimus Yamada et al., 2019 | NT | Unknown | North Pacific | Unknown | |
| Genus Tasmacetus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Shepherd's beaked whale | Tasmacetus shepherdi Oliver, 1937 | DD | Unknown | | 2–2.5 t (2.2–2.8 short tons) | |
| Genus Ziphius – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Cuvier's beaked whale | Ziphius cavirostris G. Cuvier, 1823 | LC | 100,000 | | 2–3 t (2.2–3.3 short tons) | |
| Subfamily Hyperoodontinae – three genera, 17 species |
| Genus Hyperoodon – two species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Northern bottlenose whale | Hyperoodon ampullatus Forster, 1770 | NT | 10,000 | | 7 t (7.7 short tons) | |
| Southern bottlenose whale | Hyperoodon planifrons Flower, 1882 | LC | 500,000 | | 6 t (6.6 short tons) | |
| Genus Indopacetus – one species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Tropical bottlenose whale | Indopacetus pacificus Longman, 1926 | LC | Unknown | | 3.5–4 t (3.9–4.4 short tons) | |
| Genus Mesoplodon Gervais, 1850 – 15 species |
| Common name | Scientific name | Status | Population | Distribution | Size | Picture |
| Andrews' beaked whale | Mesoplodon bowdoini Andrews, 1908 | DD | Unknown | | 1 t (1.1 short tons) | |
| Blainville's beaked whale | Mesoplodon densirostris Blainville, 1817 | LC | Unknown | | | |
| Deraniyagala's beaked whale | Mesoplodon hotaula P. E. P. Deraniyagala, 1963 | DD | Unknown | Indian and South Pacific | 4–5 m (13–16 ft) | [cetacean needed] |
| Gervais' beaked whale | Mesoplodon europaeus Gervais, 1855 | LC | Unknown | | 1.2 t (1.3 short tons) | |
| Ginkgo-toothed beaked whale | Mesoplodon ginkgodens Nishiwaki & Kamiya, 1958 | DD | Unknown | | 1.5 t (1.7 short tons) | |
| Gray's beaked whale | Mesoplodon grayi von Haast, 1876 | LC | Unknown | | 1.5 t (1.7 short tons) | |
| Hector's beaked whale | Mesoplodon hectori Gray, 1871 | DD | Unknown | | 1 t (1.1 short tons) | |
| Hubbs' beaked whale | Mesoplodon carlhubbsi Moore, 1963 | DD | Unknown | | 1.4 t (1.5 short tons) | |
| Perrin's beaked whale | Mesoplodon perrini Dalebout, Mead, Baker, Baker, & van Helding, 2002 | EN | 500–1,164 | North Pacific | 1.3–1.5 t (1.4–1.7 short tons) | |
| Pygmy beaked whale | Mesoplodon peruvianus Reyes, Mead, and Van Waerebeek, 1991 | LC | Unknown | | 800 kg (1,800 lb) | |
| Ramari's beaked whale | Mesoplodon eueu Carroll et al, 2021 | DD | Unknown | (red circle) | Unknown | |
| Sowerby's beaked whale | Mesoplodon bidens Sowerby, 1804 | LC | Unknown | | 1–1.3 t (1.1–1.4 short tons) | |
| Spade-toothed whale | Mesoplodon traversii, syn. Mesoplodon bahamondi Gray, 1874 | DD | Unknown | | 1.2 t (1.3 short tons) | |
| Stejneger's beaked whale | Mesoplodon stejnegeri True, 1885 | NT | Unknown | | 1.5 t (1.7 short tons) | |
| Strap-toothed whale | Mesoplodon layardii Gray, 1865 | LC | Unknown | | 2 t (2.2 short tons) | |
| True's beaked whale | Mesoplodon mirus True, 1913 | LC | Unknown | (North Atlantic only; map includes range of M. eueu in Indian Ocean) | 1.4 t (1.5 short tons) | |