parent_taxon metasepia
The Antarctic ( US English , UK English or and or ) is a polar region , specifically the region around the Earth ' s South Pole , opposite the Arctic region around the North Pole . The Antarctic comprises in the strict sense the continent of Antarctica and the island territories located on the Antarctic Plate . In a broader sense the Antarctic region include the ice shelves , waters , and island territories in the Southern Ocean situated south of the Antarctic Convergence , a zone approximately wide varying in latitude seasonally . The region covers some 20 % of the Southern Hemisphere , of which 5 . 5 % ( 14 million km ) is the surface ___MASK50___ of the Antarctic continent itself . All of the land and ice shelves south of 60 ° S latitude are administrated under the Antarctic Treaty System . In a biogeographic sense , the Antarctic ecozone is one of eight ecozones of the Earth ' s land surface . Metasepia is a small genus of small cuttlefish from the Pacific Ocean . The two members of this genus are characterised by a small , thick , diamond - shaped cuttlebone . Australia , officially the Commonwealth of Australia , is a country comprising the mainland of the Australian continent , the island of Tasmania and numerous smaller islands . It is the world ' s sixth - largest country by total ___MASK50___ . The neighbouring countries are Papua New Guinea , Indonesia and East Timor to the north ; the Solomon Islands and Vanuatu to the north - east ; and New Zealand to the south - east . Australia ' s capital is Canberra , and its largest urban ___MASK50___ is Sydney . An ocean ( the sea of classical antiquity ) is a body of saline water that composes much of a planet ' s hydrosphere . On Earth , an ocean is one of the major conventional divisions of the World Ocean , which covers almost 71 % of its surface . These are , in descending order by ___MASK50___ , the Pacific , Atlantic , Indian , Southern ( Antarctic ), and Arctic Oceans . The word " sea " is often used interchangeably with " ocean " in American English but , strictly speaking , a sea is a body of saline water ( generally a division of the world ocean ) partly or fully enclosed by land . Cuttlefish are marine animals of the order ___MASK59___ . They belong to the class ___MASK67___ , which also includes squid , octopuses , and nautiluses . Cuttlefish have a unique internal shell , the cuttlebone . Despite their name , cuttlefish are not fish but molluscs . A genus ( genera ) is a taxonomic rank used in the biological classification of living and fossil organisms in biology . In the hierarchy of biological classification , genus comes above species and below family . In binomial nomenclature , the genus name forms the first part of the binomial species name for each species within the genus . The ___MASK91___ ( from the Latin form of the original Ancient Greek "  ", ' sailor ') is a pelagic marine mollusc of the cephalopod family Nautilidae , the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder , Nautilina . In biology , an organism is any contiguous living system , such as an ___MASK22___ , plant , fungus , archaeon , or bacterium . All known types of organisms are capable of some degree of response to stimuli , reproduction , growth and development and homeostasis . An organism consists of one or more cells ; when it has one cell it is known as a unicellular organism ; and when it has more than one it is known as a multicellular organism . Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms . Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs . The Pacific Ocean is the largest of the Earth ' s oceanic divisions . It extends from the Arctic Ocean in the north to the Southern Ocean ( or , depending on definition , to Antarctica ) in the south and is bounded by Asia and Australia in the west and the Americas in the east . Asia is Earth ' s largest and most populous continent , located primarily in the eastern and northern hemispheres and sharing the continental landmass of Eurasia with the continent of Europe . Asia covers an ___MASK50___ of , about 30 % of Earth ' s total land ___MASK50___ and 8 . 7 % of the Earth ' s total surface ___MASK50___ . The continent , which has long been home to the majority of the ___MASK39___ population , was the site of many of the first civilizations . Asia is notable for not only its overall large size and population , but also dense and large settlements as well as vast barely populated regions within the continent of 4 . 4 billion people . Cuttlebone , also known as cuttlefish bone , is a hard , brittle internal structure ( an internal shell ) found in all members of the family ___MASK15___ , commonly known as cuttlefish , a family within the cephalopods . A cephalopod ( pronounced or ) is any member of the molluscan class ___MASK67___ ( Greek plural , " kephalópoda "; " head - feet "). These exclusively marine animals are characterized by bilateral body symmetry , a prominent head , and a set of arms or tentacles ( muscular hydrostats ) modified from the primitive molluscan foot . Fishermen sometimes call them inkfish , referring to their common ability to squirt ink . The study of cephalopods is a branch of malacology known as teuthology . The ___MASK13___ ( or ; plural : octopuses , octopodes or octopi ; see below ) is a cephalopod mollusc of the order Octopoda . It has two eyes and four pairs of arms and , like other cephalopods , it is bilaterally symmetric . It has a beak , with its mouth at the center point of the arms . It has no internal or external skeleton ( although some species have a vestigial remnant of a shell inside their mantles ), allowing it to squeeze through tight places . Octopuses are among the most intelligent and behaviorally diverse of all invertebrates . ___MASK15___ is a family of cephalopods in the order Sepiida . Binomial nomenclature ( also called binominal nomenclature or binary nomenclature ) is a formal system of naming species of living things by giving each a name composed of two parts , both of which use Latin grammatical forms , although they can be based on words from other languages . Such a name is called a binomial name ( which may be shortened to just " binomial "), a binomen or a scientific name ; more informally it is also called a Latin name . The first part of the name identifies the genus to which the species belongs ; the second part identifies the species within the genus . For example , humans belong to the genus " ___MASK87___ " and within this genus to the species " ___MASK87___ sapiens ". The " formal " introduction of this system of naming species is credited to Carl Linnaeus , effectively beginning with his work " Species Plantarum " in 1753 . But Gaspard Bauhin , in as early as 1623 , had introduced in his book " Pinax theatri botanici " ( English , " Illustrated exposition of plants ") many names of genera that were later adopted by Linnaeus .