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Russian scientists working on the White Whale Program place transmitters onto whales in Sea of Okhotsk The beluga is considered an excellent sentinel species (indicator of environment health and changes), because it is long-lived, at the top of the food web, bears large amounts of fat and blubber, relatively well-studied for a cetacean, and ...
Premaxillary teeth are absent. [1] They do not have a true dorsal fin, but do have a narrow ridge running along the back, which is much more pronounced in the narwhal. They are highly vocal animals, communicating with a wide range of sounds. Like other whales, they also use echolocation to navigate. [2]
The orca's teeth are very strong, and its jaws exert a powerful grip; the upper teeth fall into the gaps between the lower teeth when the mouth is closed. The firm middle and back teeth hold prey in place, while the front teeth are inclined slightly forward and outward to protect them from powerful jerking movements.
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the
In 1900, the American naturalist Edward William Nelson described the kăk-whăn’-û-ghăt kǐg-û-lu’-nǐk among a number of other mythical and composite animals: [1]. It is described as being similar in form to the killer whale and is credited with the power of changing at will to a wolf; after roaming about over the land it may return to the sea and again become a whale.
Animal-made art consists of works by non-human animals, that have been considered by humans to be artistic, including visual works, music, photography, and videography. Some of these are created naturally by animals, often as courtship displays , while others are created with human involvement.
Ivory is a fragile medium; many 19th-century pieces were preserved because they were kept in a barrel of oil on board ship. Gary Kiracofe, a scrimshander in Nantucket, Massachusetts, advises collectors that if a piece looks dry, one should fill the center of the tooth with unscented baby oil and allow it to remain until as much oil as possible is soaked into the microscopic pores of the ivory.
Each species' teeth have a characteristically unique shape. In some cases, these teeth even hinder feeding; in the strap-toothed whale, for example, the teeth curve over the upper jaw, effectively limiting the gape to a few centimeters. Females are presumed to select mates based on the shape of the teeth, because the different species are ...