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Sthenoteuthis pteropus
''Sthenoteuthis pteropus'', also known as the orangeback flying squid or orangeback squid, is a species of cephalopod in the family Ommastrephidae. It is native to tropical parts of the Atlantic Ocean where it is found to depths of about .
==Description==
Like other squid, ''Sthenoteuthis pteropus'' is bilaterally symmetrical and has a head with a pair of eyes, eight arms and two tentacles and a fleshy, muscular body known as the mantle. The head is not retractable, the arms have blunt tips and there is a marked crest on the outer surface of the third pair. The tentacles are slender and the terminal sections are armed with a transverse row of large toothed suckers and other smaller suckers for capturing prey, and the column with a fixing apparatus of knobs and small suckers. The mantle is cylindrical, narrowing slightly towards the posterior end where there is a wide, roughly diamond-shaped fin. There are a number of bioluminescent photophores on the head, mantle and fourth arms, with a concentrated patch on the anterior dorsal surface of the mantle forming a luminous orange oval shape. ''Sthenoteuthis pteropus'' grows to a mantle length of about with a fin width about three quarters of this.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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