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The narwhal is a stocky cetacean with a relatively blunt snout, a large melon, and a shallow ridge in place of a dorsal fin. Males of this species have a large (1.5–3.0 m (4 ft 11 in – 9 ft 10 in)) long tusk, which is a protruding left canine thought to function as a weapon, a tool for feeding, in attracting mates or sensing water salinity.
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.
This is a list of Arctic cetaceans. Cetacea. Narwhals Beluga whales. Balaenidae [1] Bowhead whale (ᐊᕐᕕᖅ, arviq) Balaena mysticetus [2] [3] Balaenopteridae [1]
The cetacean family Monodontidae comprises two living whale species, the narwhal and the beluga whale and at least four extinct species, known from the fossil record. Beluga and Narwhal are native to coastal regions and pack ice around the Arctic Ocean.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
The order Artiodactyla consists of 349 extant species belonging to 132 genera. This does not include hybrid species or extinct prehistoric species. Modern molecular studies indicate that the 132 genera can be grouped into 23 families; these families are grouped into named suborders and many are further grouped into named clades, and some of these families are subdivided into named subfamilies.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Usage of collective nouns Notes Further reading External links Generic terms The terms in this table apply to many ...
According to the International Union for Conservation of Nature (IUCN), 65 mammal species in the United States are threatened or nearly threatened with extinction. [1] The IUCN has classified each of these species into one of four conservation statuses: near threatened NT, vulnerable VU, endangered EN, and critically endangered CR.