Cetacea is aninfraorder that comprises the 94 species ofwhales,dolphins, andporpoises. It is divided intotoothed whales (Odontoceti) andbaleen whales (Mysticeti), which diverged from each other in theEocene some 50million years ago (mya). Cetaceans are descended from land-dwelling hoofed mammals, and the now extinctarchaeocetes represent the several transitional phases from terrestrial to completely aquatic.^[1] Historically, cetaceans were thought to have descended from the wolf-likemesonychians, butcladistic analyses confirm their placement witheven-toed ungulates in the order Cetartiodactyla.^{[2][3][4][5][6]}

Whale populations were drastically reduced in the 20th century from intensivewhaling, which led to a moratorium on hunting by theInternational Whaling Commission in 1982.^[7] Smaller cetaceans are at risk of accidentally getting caught by fishing vessels using, namely,seine fishing,drift netting, orgill netting operations.^[8]

Mammals by population
Lists Even-toed ungulates(Artiodactyla) Carnivorans(Carnivora) Cetaceans(Cetacea) Bats(Chiroptera) Odd-toed ungulates(Perissodactyla) Primates(Primates)
Key
Related Lists of organisms by population List of birds by population Mammal classification List of recently extinct mammals Lists of mammals by region
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The following is a list of currently existing (or, in the jargon of taxonomy) 'extant'species of theinfraordercetacea (for extinct cetacean species, see thelist of extinct cetaceans). The list is organizedtaxonomically intoparvorders,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 ahuman; and a photograph.

Conservation status codes listed follow theIUCN Red List of Threatened Species (v. 2014.3; data current at 20 January 2015).^[9]

Where available, the global population estimate has been listed. When not cited or footnoted differently, these are from theIUCN Red List of Threatened Species (v. 2014.3; data current at 20 January 2015).^[9]

The baleen whales, also called whalebone whales or great whales, form theparvorder Mysticeti. Baleen whales are characterized by havingbaleen plates for filter feeding and two blowholes.^[10]

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, narrowrostrum, 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.^[11]

GenusBalaenaLinnaeus,1758 – one species
Common name	Scientific name	IUCN Red List status	Global population estimate	Range	Size	Picture
Bowhead whale	Balaena mysticetus Linnaeus,1758	LCIUCN	10,000		60 t (66 short tons)
GenusEubalaenaGray, 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	CRIUCN	350		40–80 t (44–88 short tons)
North Pacific right whale	Eubalaena japonica Lacépède, 1818	ENIUCN	404–2,108[12]		60–80 t (66–88 short tons)
Southern right whale	Eubalaena australis Desmoulins, 1822	LCIUCN	13,600[13]		40–80 t (44–88 short tons)

Rorquals are the largest group of baleen whales, with eleven species in three genera. They include the largest animal that has ever lived, theblue whale. They take their name from aNorwegian word meaning "furrow whale"; all members of the family have a series of longitudinal folds of skin running from below the mouth back to thenavel (except thesei whale, which has shorter grooves). They allow the mouth to expand immensely when feeding.^[14] All rorquals have these unique folds.^[11]

SubfamilyBalaenopteridae – one genus, nine species
GenusBalaenoptera – nine species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Blue whale	Balaenoptera musculus Linnaeus,1758	ENIUCN	5,000–15,000		50–150 t (55–165 short tons)
Bryde's whale	Balaenoptera brydei Olsen, 1913	LCIUCN	90,000–100,000		14–30 t (15–33 short tons)
Eden's whale[a]	Balaenoptera edeni Anderson, 1879	LCIUCN	Unknown		Unknown
Common minke whale	Balaenoptera acutorostrata Lacépède, 1804	LCIUCN	200,000		2–4 t (2.2–4.4 short tons)
Rice's whale[16]	Balaenoptera ricei Roselet al., 2021	CRIUCN	30–100		~13.9 t (15.3 short tons)
Fin whale	Balaenoptera physalus Linnaeus,1758	VUIUCN	100,000		30–80 t (33–88 short tons)
Omura's whale	Balaenoptera omurai Wada et al., 2003	DDIUCN	Unknown	Unknown	Unknown
Sei whale	Balaenoptera borealis Lesson, 1828	ENIUCN	80,000[17]		20–25 t (22–28 short tons)
Antarctic minke whale	Balaenoptera bonaerensis Burmeister, 1867	NTIUCN	515,000[18]		6–10 t (6.6–11.0 short tons)
GenusMegapteraGray, 1846 – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Humpback whale	Megaptera novaeangliae Borowski, 1781	LCIUCN	84,000		25–30 t (28–33 short tons)
GenusEschrichtiusGray, 1864 – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Gray whale	Eschrichtius robustus Lilljeborg, 1861	LCIUCN	21,000[19]		15–40 t (17–44 short tons)

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.^[11] The pygmy right whale is the onlyextant member of its family.

GenusCapereaGray, 1864 – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Pygmy right whale	Caperea marginata Gray, 1846	LCIUCN	Unknown		3–3.5 t (3.3–3.9 short tons)

The toothed whales (parvorder Odontoceti), as the name suggests, are characterized by having teeth (rather thanbaleen). Toothed whales are active hunters, feeding onfish,squid, and in some cases othermarine mammals.^[20]

Oceanic dolphins are the members of the family Delphinidae. As the name implies, they tend to be found in the open seas, unlike theriver dolphins, although a few species such as theIrrawaddy dolphin are coastal or riverine.

The Delphinidae are characterized by having distinctbeaks (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.^[11]

GenusCephalorhynchusGray, 1846 – four species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Chilean dolphin	Cephalorhynchus eutropia Gray, 1846	NTIUCN	Unknown[b]		60 kg (130 lb)
Commerson's dolphin	Cephalorhynchus commersonii Lacépède, 1804	LCIUCN	22,000[21]		35–60 kg (77–132 lb)
Heaviside's dolphin	Cephalorhynchus heavisidii Gray, 1828	NTIUCN	Unknown		40–75 kg (88–165 lb)
Hector's dolphin	Cephalorhynchus hectori Van Beneden, 1881	ENIUCN (subspeciesMaui dolphinCRIUCN)	7,381 (subspeciesMaui dolphin 57–75 in 2016)		35–60 kg (77–132 lb)
GenusDelphinus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Common dolphin	Delphinus delphis Linnaeus,1758	LCIUCN	Unknown[c]		70–150 kg (150–330 lb)
GenusFeresa – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Pygmy killer whale	Feresa attenuata Gray, 1875	LCIUCN	Unknown[d]		160–350 kg (350–770 lb)
GenusGlobicephala – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Long-finned pilot whale	Globicephala melas Traill, 1809	LCIUCN	Unknown[e]	(green)	1.8–3.5 t (2.0–3.9 short tons)
Short-finned pilot whale	Globicephala macrorhynchus Gray, 1846	LCIUCN	Unknown[f]	(dark blue)	1–4 t (1.1–4.4 short tons)
GenusGrampus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Risso's dolphin	Grampus griseus G. Cuvier, 1812	LCIUCN	Unknown[g]		300 kg (660 lb)
GenusLagenodelphis – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Fraser's dolphin	Lagenodelphis hosei Fraser, 1956	LCIUCN	Unknown[h]		209 kg (461 lb)
GenusLagenorhynchusGray, 1846 – six species[i]
Common name	Scientific name	Status	Population	Distribution	Size	Picture
White-beaked dolphin	Lagenorhynchus albirostris Gray, 1846	LCIUCN	100,000[j]		180 kg (400 lb)
Atlantic white-sided dolphin	Lagenorhynchus acutus Gray, 1828	LCIUCN	200,000–300,000[citation needed]		235 kg (518 lb)
Dusky dolphin	Lagenorhynchus obscurus Gray, 1828	LCIUCN	Unknown		100 kg (220 lb)
Hourglass dolphin	Lagenorhynchus cruciger Quoy &Gaimard, 1824	LCIUCN	140,000		90–120 kg (200–260 lb)
Pacific white-sided dolphin	Lagenorhynchus obliquidens Gill, 1865	LCIUCN	1,000,000		85–150 kg (187–331 lb)
Peale's dolphin	Lagenorhynchus australis Peale, 1848	LCIUCN	Unknown[k]		115 kg (254 lb)
GenusLissodelphis – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Northern right whale dolphin	Lissodelphis borealis Peale, 1848	LCIUCN	400,000[l]		115 kg (254 lb)
Southern right whale dolphin	Lissodelphis peronii Lacépède, 1804	LCIUCN	Unknown[m]		60–100 kg (130–220 lb)
GenusOrcaellaGray, 1866 – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Australian snubfin dolphin	Orcaella heinsohni Beasley, Robertson & Arnold, 2005	VUIUCN	9,000–10,000		130–145 kg (287–320 lb)
Irrawaddy dolphin	Orcaella brevirostris Gray, 1866	ENIUCN	78–102		130 kg (290 lb)
GenusOrcinus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Orca	Orcinus orca Linnaeus,1758	DDIUCN	100,000[n]		4.5 t (5.0 short tons)
GenusPeponocephala – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Melon-headed whale	Peponocephala electra Gray, 1846	LCIUCN	Unknown[o]		225 kg (496 lb)
GenusPseudorca – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
False killer whale	Pseudorca crassidens Owen, 1846	NTIUCN	Unknown[p]		1.5–2 t (1.7–2.2 short tons)
GenusSousa – four species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Atlantic humpback dolphin	Sousa teuszii Kükenthal, 1892	CRIUCN	1,500		100–150 kg (220–330 lb)
Australian humpback dolphin	Sousa sahulensis Jefferson & Rosenbaum, 2014	VUIUCN	10,000		230–250 kg (510–550 lb)
Indian Ocean humpback dolphin	Sousa plumbea Cuvier, 1829	ENIUCN	Unknown[q]
Indo-Pacific humpback dolphin	Sousa chinensis Osbeck, 1765	VUIUCN	Unknown		250–280 kg (550–620 lb)
GenusSotalia – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Guiana dolphin	Sotalia guianensis Bénéden, 1864	NTIUCN	Unknown		35–45 kg (77–99 lb)
Tucuxi	Sotalia fluviatilis Gervais & Deville, 1853	ENIUCN	Unknown		35–45 kg (77–99 lb)
GenusStenellaGray, 1866 – five species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Atlantic spotted dolphin	Stenella frontalis Cuvier, 1829	LCIUCN	100,000[citation needed]		100 kg
Clymene dolphin	Stenella clymene Gray, 1846	LCIUCN	Unknown		75–80 kg (165–176 lb)
Pantropical spotted dolphin	Stenella attenuata Gray, 1846	LCIUCN	3,000,000[citation needed]		100 kg (220 lb)
Spinner dolphin	Stenella longirostris Gray, 1828	LCIUCN	Unknown		90 kg (200 lb)
Striped dolphin	Stenella coeruleoalba Meyen, 1833	LCIUCN	2,000,000[citation needed]		100 kg (220 lb)
GenusSteno – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Rough-toothed dolphin	Steno bredanensis Lesson, 1828	LCIUCN	150,000		100–135 kg (220–298 lb)
GenusTursiops – three species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Common bottlenose dolphin	Tursiops truncatus Montagu, 1821	LCIUCN	600,000[22]		150–650 kg (330–1,430 lb)
Indo-Pacific bottlenose dolphin	Tursiops aduncus Ehrenberg, 1833	NTIUCN	Unknown		230 kg (510 lb)
Tamanend's bottlenose dolphin	Tursiops erebennus Cope, 1865	NE	Unknown	Unknown	Unknown

This family contains one genus with two species.

GenusInia – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Amazon river dolphin	Inia geoffrensis Blainville, 1817	ENIUCN	Unknown		150 kg (330 lb)
Araguaian river dolphin[r]	Inia araguaiaensis Hrbek, Da Silva, Dutra, Farias, 2014	NE	Unknown	Araguaian river dolphin in blue	150 kg (330 lb)

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.^[23]

GenusKogia – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Dwarf sperm whale	Kogia sima Owen, 1866	LCIUCN	Unknown[s]		250 kg (550 lb)
Pygmy sperm whale	Kogia breviceps Blainville, 1838	LCIUCN	Unknown[t]		400 kg (880 lb)

The family Lipotidae contains only thebaiji. DNA evidence suggests it separated from oceanic dolphins about 25 million years ago.^[24] The species was declaredfunctionally extinct in 2006 after anexpedition to estimate the population found none.

GenusLipotes – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Baiji	Lipotes vexillifer Miller, 1918	CRIUCN	0–13[u]		130 kg (290 lb)

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 theirArctic habitat. Theflippers 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.^[11]

GenusDelphinapterus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Beluga	Delphinapterus leucas Pallas, 1776	LCIUCN	136,000[v]		1.5 t (1.7 short tons)
GenusMonodon – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Narwhal	Monodon monoceros Linnaeus,1758	LCIUCN	123,000		900–1,500 kg (2,000–3,300 lb)

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.^[25]

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).

GenusNeophocaena – two or three species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Indo-Pacific finless porpoise	Neophocaena phocaenoides Cuvier, 1829	VUIUCN[w]	Unknown[x]		30–45 kg (66–99 lb)
Yangtze finless porpoise	Neophocaena asiaeorientalis Cuvier, 1829	ENIUCN (subspeciesYangtze finless porpoiseCRIUCN)[y]	Unknown (subspeciesYangtze finless porpoise 1,012 in 2018[26][27])		30–45 kg (66–99 lb)
GenusPhocoena – four species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Burmeister's porpoise	Phocoena spinipinnis Burmeister, 1865	NTIUCN	Unknown[z]		50–75 kg (110–165 lb)
Harbour porpoise	Phocoena phocoena Linnaeus,1758	LCIUCN	700,000[28]		75 kg (165 lb)
Spectacled porpoise	Phocoena dioptrica Lahille, 1912	LCIUCN	Unknown[aa]		60–84 kg (132–185 lb)
Vaquita	Phocoena sinus Norris & McFarland, 1958	CRIUCN	12[29]		50 kg (110 lb)
GenusPhocoenoides – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Dall's porpoise	Phocoenoides dalli True, 1885	LCIUCN	1,100,000[ab]		130–200 kg (290–440 lb)

The sperm whale characteristically has a large, squarish head one-third the length of its body; theblowhole is slightly to the left hand side; the skin is usually wrinkled; and it has no teeth on the upper jaw.

GenusPhyseter – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Sperm whale	Physeter macrocephalus Linnaeus,1758	VUIUCN	200,000–2,000,000[ac]		25–50 t (28–55 short tons)

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.^[30] However, more recent studies support them being distinct species.^[31]

GenusPlatanista – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Ganges river dolphin	Platanista gangetica (Lebeck, 1801)	ENIUCN	3,500[32]	(orange)	200 kg (440 lb)
Indus river dolphin	Platanista minor Owen, 1853	ENIUCN	1,450[33]	(blue)	200 kg (440 lb)

The La Plata dolphin is the only species of the family Pontoporiidae and genusPontoporia. 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.^[34]

GenusPontoporia – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
La Plata dolphin	Pontoporia blainvillei Gervais & d'Orbigny, 1844	VUIUCN	4,000–4,500		50 kg (110 lb)

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 assuction 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).^[11]

GenusBerardius – three species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Arnoux's beaked whale	Berardius arnuxii Duvernoy, 1851	LCIUCN	Unknown[ad]		8 t (8.8 short tons)
Baird's beaked whale	Berardius bairdii Stejneger, 1883	LCIUCN	Unknown[ae]		12 t (13 short tons)
Sato's beaked whale	Berardius minimus Yamada et al., 2019	NTIUCN	Unknown	North Pacific	Unknown
GenusTasmacetus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Shepherd's beaked whale	Tasmacetus shepherdi Oliver, 1937	DDIUCN	Unknown[af]		2–2.5 t (2.2–2.8 short tons)
GenusZiphius – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Cuvier's beaked whale	Ziphius cavirostris G. Cuvier, 1823	LCIUCN	100,000[ag]		2–3 t (2.2–3.3 short tons)
SubfamilyHyperoodontinae – three genera, 17 species
GenusHyperoodon – two species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Northern bottlenose whale	Hyperoodon ampullatus Forster, 1770	NTIUCN	10,000[ah]		7 t (7.7 short tons)
Southern bottlenose whale	Hyperoodon planifrons Flower, 1882	LCIUCN	500,000		6 t (6.6 short tons)
GenusIndopacetus – one species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Tropical bottlenose whale	Indopacetus pacificus Longman, 1926	LCIUCN	Unknown[ai]		3.5–4 t (3.9–4.4 short tons)
GenusMesoplodonGervais, 1850 – 15 species
Common name	Scientific name	Status	Population	Distribution	Size	Picture
Andrews' beaked whale	Mesoplodon bowdoini Andrews, 1908	DDIUCN	Unknown		1 t (1.1 short tons)
Blainville's beaked whale	Mesoplodon densirostris Blainville, 1817	LCIUCN	Unknown
Deraniyagala's beaked whale	Mesoplodon hotaula P. E. P. Deraniyagala, 1963	DDIUCN	Unknown	Indian and South Pacific	4–5 m (13–16 ft)	[cetacean needed]
Gervais' beaked whale	Mesoplodon europaeus Gervais, 1855	LCIUCN	Unknown		1.2 t (1.3 short tons)
Ginkgo-toothed beaked whale	Mesoplodon ginkgodens Nishiwaki & Kamiya, 1958	DDIUCN	Unknown		1.5 t (1.7 short tons)
Gray's beaked whale	Mesoplodon grayi von Haast, 1876	LCIUCN	Unknown		1.5 t (1.7 short tons)
Hector's beaked whale	Mesoplodon hectori Gray, 1871	DDIUCN	Unknown		1 t (1.1 short tons)
Hubbs' beaked whale	Mesoplodon carlhubbsi Moore, 1963	DDIUCN	Unknown		1.4 t (1.5 short tons)
Perrin's beaked whale	Mesoplodon perrini Dalebout, Mead, Baker, Baker, & van Helding, 2002	ENIUCN	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	LCIUCN	Unknown		800 kg (1,800 lb)
Ramari's beaked whale	Mesoplodon eueu Carrollet al, 2021	DDIUCN	Unknown	(red circle)	Unknown
Sowerby's beaked whale	Mesoplodon bidens Sowerby, 1804	LCIUCN	Unknown		1–1.3 t (1.1–1.4 short tons)
Spade-toothed whale	Mesoplodon traversii,syn.Mesoplodon bahamondi Gray, 1874	DDIUCN	Unknown		1.2 t (1.3 short tons)
Stejneger's beaked whale	Mesoplodon stejnegeri True, 1885	NTIUCN	Unknown		1.5 t (1.7 short tons)
Strap-toothed whale	Mesoplodon layardii Gray, 1865	LCIUCN	Unknown		2 t (2.2 short tons)
True's beaked whale	Mesoplodon mirus True, 1913	LCIUCN	Unknown	(North Atlantic only; map includes range ofM. eueu in Indian Ocean)	1.4 t (1.5 short tons)

• List of cetacean genera
• List of extinct cetaceans
• List of individual cetaceans
• Evolution of cetaceans
• Archaeoceti
• List of whale vocalizations
• List of marine mammal species
• Mammal classification

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