beluga

/beuh looh"geuh/, n.
1. Also called hausen. a white sturgeon, Huso huso, of the Black and Caspian seas, valued as a source of caviar and isinglass.
2. Also called white whale. a cetacean, Delphinapterus leucas, of northern seas, that has a rounded head and is white when adult.
[1585-95; < Russ belúga (now regularly belúkha for the cetacean), equiv. to bél(yi) white + -uga, prob. earlier *-oga (cf. Czech pstruh, Pol pstrag trout < *pistr- mottled + *-ogu a cognate suffix)]

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I

Large species of sturgeon (Huso huso, or Acipenser huso) that inhabits the Caspian and Black seas and the Sea of Azov.

It reaches a length of 25 ft (7.5 m) and a weight of 2,900 lbs (1,300 kg), but its flesh and caviar are less valuable than those of smaller species.
II

Species (Delphinapterus leucas) of whale found in the Arctic Ocean and adjacent seas, in both deep offshore and coastal waters.

It may also enter rivers that empty into far northern seas. A toothed whale with a rounded forehead and no dorsal fin, the beluga is about 13 ft (4 m) long. Born dark blue-gray or blackish, it fades to white or cream at 4–5 years of age. It feeds on fish, cephalopods, and crustaceans and usually lives in groups of five to 10. It has been hunted commercially for its oil, hide, and flesh, and is used in the Arctic as food for humans and dogs.

Beluga, or white whale (Delphinapterus leucas).

E.R. Degginger

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also called  Hausen,  

      large species of sturgeon (q.v.).

whale
also called  white whale 
 a small, toothed whale found mainly in the coastal waters of the Arctic Ocean and adjacent seas but also in rivers and deep offshore waters. It is an extremely vocal cetacean and thus has also been referred to as the “canary of the sea.” This whale can also proficiently mimic a variety of sounds. Easily caught in shallow water, the beluga has been kept in captivity since the 1860s, and its coloration and adaptability have made it popular at oceanariums.

      Belugas are about 1.5 metres (4.9 feet) long at birth and grow to a length of about 4 metres. Newborn calves are gray to brown, but their colour fades with age until they become completely white after attaining sexual maturity at four to five years old. Adults have broad flippers with upward-curving tips, but there is no dorsal fin. Belugas have a rounded forehead and extremely plastic facial features, enabling the whales to alter the external shape of their head at will.

      Arctic populations of beluga whales are at home in pack ice but must migrate to warmer waters when the sea freezes over completely. They usually live in groups of 5 to pods of more than 1,000, feeding on fish, cephalopods (cephalopod), crustaceans (crustacean), and worms.

      In the Arctic the beluga is hunted as food for humans and dogs. During the 19th and early 20th centuries, it was taken commercially for its oil, flesh, and hides, which provided industrial leather, belts, and shoelaces. The beluga population in the Gulf of St. Lawrence (Saint Lawrence, Gulf of) was nearly exterminated for its hides, and some other beluga populations are endangered by pollution.

      Beluga whales are related to the narwhal, and together these two species constitute the family Monodontidae of suborder Odontoceti (the toothed whales). The beluga's generic name comes from the Greek word for dolphin, delphinos, combined with apteron, alluding to its lack of dorsal fin. The specific epithet leucas is derived from the Greek leukos, meaning “white.” The common name, sometimes spelled belukha, is derived from the Russian belyi, again meaning “white.” Beluga is also a common name for the unrelated great white sturgeon of caviar fame.

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Universalium. 2010.

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