### animal | vertebrate | mammal | whale:

Narwhal
* All narwhals have two teeth in their upper jaw.
* Most narwhals adapt to cold water
  - environments
* Most narwhals attain maturity
  - sexual maturity
  - capture prey
  - detect prey
  - eat fish
  - has-part teeth
* Most narwhals have heads
  - just one tusk, but narwhals with two tusks have been reported
  - layers
  - ranges
  - senses
  - straight teeth
* Most narwhals possess bodies
  - spiral teeth
* Some narwhals die during winter.
* Some narwhals eat arctic cods
* Some narwhals have humps
  - up to two tusks, while others have none
* Some narwhals live along canadian coasts
  - produce noise
* Some narwhals reach maturity
* also differ from belugas in skin color
  - exhibit a mottled pigmentation or white blotches on their pale bluish skin
* are animals
  - born gray and as they age they turn black and white
  - close range hunters that travel in the Arctic waters
  - countershaded, which means they are dark on top and light on the bottom
  - grey with black mottling, adult belugas white or near-white
* are hunted by some northern indigenous cultures
  - for their ivory tusks, blubber, and meat
  - in Canada and Greenland
  - inhabitants of Arctic waters and are found at all depths
  - less colored than many whales
  - located in the Canadian Arctic
  - mammals so they produce milk for their young
  - migrating animals who like to move from one place to live in another place for a while
  - one of the northernmost cetacean species with a smaller range than other cetaceans
  - preyed upon by polar bears and walruses if they get trapped by shifting ice
  - related to bottlenose dolphins, belugas, harbor porpoises, and orcas
  - sexually dimorphic
  - social whales that live in frigid Arctic waters
  - the only whale that winters in the dense Arctic pack ice
  - very important to native communities
  - warm blooded air breathing mammals that give birth to live young that suckle on milk
* change color as they age
  - colour with age
* choose similar wintering grounds year after year independent of sea ice conditions
  - the same wintering grounds year after year independent of sea ice conditions
* consume squid, fish and shrimp.
* eat a varied diet consisting in part of fishes and invertebrates
  - fish , squid , shrimp, and other marine animals
* exist in a number of smaller sub-populations or stocks.
* feed more regularly in the winter, consuming fish like cod and halibut, shrimp, and squid
  - mostly in deep water and possibly at or near the bottom
  - on Greenland halibut, Arctic and polar cod, squid and shrimp
* generally move slowly, but are known to be remarkably quick when chased by predators.
* grow long tusks, if they have the balls to do it.
* harbor several species of commensal animals such as whale lice and certain nematodes.
* have a black and white mottled skin pattern and are white underneath
  - cylindrical body, with a blunt head and small mouth
  - complex systems in there bodies that are used to make the sounds
  - improper dentition with only two teeth, both of which are present in the upper jaw
  - just two teeth, both in the upper jaw
  - no other visible teeth in their jaws
* includes brains
  - breasts
  - cell membranes
  - cells
  - chest cavities
  - chests
  - corpi
  - cytoplasm
  - faces
  - flippers
  - nuclei
  - pedal extremities
  - piluses
  - plasma membranes
  - rib cages
  - sections
  - skulls
  - sterna
  - vacuoles
  - vertebrate feet
* inhabit the cold waters of the Arctic Circle near northern Canada and Greenland
  - vast areas of Arctic waters
* lack a dorsal fin, and in adults the flippers are turned upward at the tips.
* likely possess excellent hearing and vision.
* live in an Arctic environment that is rapidly changing.
* live in the arctic and are said to be rare
  - icy waters of the Arctic seas
  - water that is at a fairly steady temperature around freezing point all year round
* mate in the water, belly to belly.
* migrate, wintering in pack ice and summering in deep sounds and fjords.
* often break tusks, however they are able to repair the damage with new dentine growth.
* only have two teeth
  - vestigial teeth
* primarily inhabit the Atlantic sector of the Arctic.
* return to bays
  - coastal bays
* spend the summer in ice-free coastal areas of the high Arctic
  - their whole lives in Arctic waters, bordering Russia, North America, and Greenland
* supply various staples in the traditional subsistence economy.
* travel farther north than perhaps any other whale species.
* use sound.
+ Narwhal, Description: Toothed whales
  * All narwhals have two teeth in their upper jaw. After the first year of a male narwhal's life, its left tooth grows outward, spirally. Tusks are usually twisted in a counterclockwise direction and are hollow inside. The tusk is not used in hunting. In fact, when people found the horn of a dead narwhal washed up on shore, they thought that they had found the horn of a unicorn. Daston, Lorraine and Katharine Park
  - Habitat
  * Narwhals live in the icy waters of the Arctic seas. They do not go far away from ice. Narwhals are migrating animals who like to move from one place to live in another place for a while