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The Polar cod or Arctic cod (Boreogadus saida) is a fish of the family Gadidae, related to the true cod (genus Gadus). Note that there is another fish with the common name Arctic cod, Arctogadus glacialis.
The Polar cod has a slender body, deeply forked tail, projecting mouth and a small whisker on its chin. It is plainly coloured with brownish spots and a silvery body. It grows to a length of 30 cm. The Polar cod is found further north than any other fish species (beyond 84 degrees N) with a distribution spanning the Arctic seas off northern Russia, Alaska, Canada, and Greenland.
This fish is most commonly found at the water's surface, but is also known to travel at depths greater than 900 m. The Polar cod is known to frequent river mouths. It is a hardy fish that survives best at temperatures of 0-4 degrees Celsius but may tolerate colder temperatures owing to to presence of antifreeze protein compounds in its blood. They group in large schools in ice-free waters.
The Polar cod feeds on planktonPlankton is the aggregate community of weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater. The name comes from the Greek term, —meaning "wanderer" or "drifter". While some forms o in the upper water column (unlike their relative, the Atlantic codThe Atlantic cod Gadus morhua is a well-known foodfish belonging to the family Gadidae. It grows to two metres (6 1/2 feet) in length. Colouring is brown to green on the dorsal side, shading to silver ventrally. Its habitat ranges from the shoreline down, which feeds on the bottom). It is in turn the primary food source for narwhalNarwhal range The Narwhal Monodon monoceros is an Arctic species of cetacean similar in size and shape to a dolphin. It is rarely found south of latitude 70°N. It is one of two species of whale in the Monodontidae family (the other is the beluga). It is ps, belugaThis article refers to the whale, beluga. For other meanings, see Beluga (disambiguation). For other meanings of the name White Whale (a synonym), see White Whale (disambiguation). Beluga range The Beluga Whale or White Whale Delphinapterus leucas is an As, ringed seals and seabirdSeabirds are birds that spend much of their lives, outside the breeding season at least, at sea. Some species, such as the albatrosses and petrels are truly pelagic, breeding on sea cliffs and small islands, and wintering on the open ocean. They are totals. They are fishFishing is both the recreation and sport of catching fish (for food or as a trophy), and the commercial fishing industry of catching or harvesting seafood (either fish or other aquatic life-forms, such as shellfish). Fishing is done in a river, canal, laked commercially in Russia and are considered an excellent table fish.
Gadiformes
