The Bald notothen (Pagothenia borchgrevinki) is a cryopelagic fish of the Southern Ocean. Antifreeze proteins in its blood prevent it freezing in the sub-zero water temperatures of Antarctica. It is found in the Weddell Sea, the Ross Sea, the Davis Sea, in Vincennes Bay, and around the Budd Coast, the Antarctic Peninsula, South Orkneys and South Shetland Islands. Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... Animalia redirects here. ... Typical Classes See below Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. ... Orders See text The Actinopterygii are the ray-finned fish. ... Families many, see text The Perciformes, also called the Percomorphi or Acanthopteri, include about 40% of all fish and are the largest order of vertebrates. ... Species Genus Aethotaxis    mitopteryx Genus Cryothenia    peninsulae Genus Dissostichus    eleginoides    mawsoni Genus Gobionotothen    acuta    barsukovi    gibberifrons    marionensis Genus Gvozdarus    svetovidovi Genus Lepidonotothen    kempi    larseni    macrophthalma    mizops    nudifrons    squamifrons Genus Notothenia    angustata    coriiceps    cyanobrancha    microlepidota    rossii Genus Pagothenia    borchgrevinki    brachysoma Genus Paranotothenia    dewitti    magellanica Genus Patagonotothen (all non-Antarctic)    brevicauda    canina... In biology, binomial nomenclature is the formal method of naming species. ... George Boulenger. ... Antifreeze proteins AFPs or ice structuring proteins ISPs refer to a class of polypeptides produced by certain vertebrates, plants, fungi and bacteria that permit their survival in subzero environments. ... The Weddell Sea is part of the Southern Ocean. ... Map of Antarctica (click to enlarge) Ice in the Ross Sea, Antarctica The Ross Sea is a deep bay of the Southern Ocean in Antarctica between Victoria Land and Marie Byrd Land. ... Davis Sea (66°00′ S 092°00′ E) is an area of the sea along the coast of Antarctica between West Ice Shelf and the Shackleton Ice Shelf. ... Vincennes Bay (66º30´S 109º30´E) is a large V-shaped bay, 105 km (65 mi) wide at its entrance between Cape Nutt and Cape Folger and marked by several large, steep glaciers near its head, lying along Knox and Budd Coasts. ... Antarctic Peninsula map Booth Island and Mount Scott flank the narrow Lemaire Channel on the west side of the Antarctic Peninsula. ... The South Orkney Islands (Spanish: Islas Orcadas) are a group of sub-antarctic islands situated at latitudes 60°50 to 60°83 S, and longitudes 44°25 to 46°25 W in the Southern Ocean. ... The South Shetland Islands or Iles Shetland du Sud or Islas Shetland del Sur or New South Britain or New South Shetland or Shetland Islands or South Shetlands or Sydshetland or Süd-Shetland Inseln are a chain of islands in the Southern Ocean lying about 120 kilometres northward of...

Growing to a maximum length of about 28 cm (11 in), it is yellow with dark spots and irregular crossbars. Its dorsal and caudal fins may occasionally also be spotted. Dorsal fin of an orca A dorsal fin is a fin located on the backs of fishes, whales, dolphins, and porpoises, as well as the (extinct) ichthyosaurs. ... Fish anatomy is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs light more than air does. ...

It spends most of the time under the ice at depths to 550 m (1805 ft) where it feeds on copepods and krill. It is preyed upon by the Ploughfish, Gymnodraco acuticeps, the Antarctic Cod, Dissostichus mawsoni as well as the Emperor Penguin, Aptenodytes forsteri. Orders Calanoida Cyclopoida Gelyelloida Harpacticoida Misophrioida Monstrilloida Mormonilloida Platycopioida Poecilostomatoida Siphonostomatoida Copepods are a group of small crustaceans found in the sea and nearly every freshwater habitat. ... Families Euphausiidae Euphausia Dana, 1852 Meganyctiphanes Holt and W. M. Tattersall, 1905 Nematobrachion Calman, 1905 Nematoscelis G. O. Sars, 1883 Nyctiphanes G. O. Sars, 1883 Pseudeuphausia Hansen, 1910 Stylocheiron G. O. Sars, 1883 Tessarabrachion Hansen, 1911 Thysanoessa Brandt, 1851 Thysanopoda Latreille, 1831 Bentheuphausiidae Bentheuphausia amblyops Krill are shrimp-like marine... Binomial name Dissostichus mawsoni Norman, 1937 The Antarctic Cod Dissostichus mawsoni, of the fish family Nototheniidae, is famous for producing antifreeze glycoprotein that allows it to survive in the ice-laden waters of the Southern Ocean surrounding Antarctica. ... Binomial name Aptenodytes forsteri Gray, 1844 The Emperor Penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species. ...

References

• Pagothenia borchgrevinki (TSN 642902). Integrated Taxonomic Information System. Accessed on 11 May 2007.
• "Pagothenia borchgrevinki". FishBase. Ed. Ranier Froese and Daniel Pauly. May 2007 version. N.p.: FishBase, 2007.