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Illex oxygonius : ウィキペディア英語版 | Illex oxygonius
''Illex oxygonius'', commonly known as the sharptail shortfin squid, is a species of neritic squids in the family Ommastrephidae. Of the species of the genus ''Illex'', they have the most restricted range, being found only in the western North Atlantic Ocean; from off New Jersey, south to the Straits of Florida and into the Gulf of Mexico. They are very difficult to distinguish from ''Illex coindetii'' and ''Illex illecebrosus'', with which their geographic range overlaps. The most obvious difference of ''I. oxygnius'' is their sharper fin angles of 25° to 40° (hence their common name). There is also the possibility that they may be a hybrid of ''I. coindetii'' and ''I. illecebrosus''.〔Michael Vecchione, Clyde F.E. Roper, & Michael J. Sweeney (February 1989). "Marine Flora and Fauna of the Eastern United States. Mollusca: Cephalopoda". ''NOAA Technical Report NMFS 73'' (National Oceanic and Atmospheric Administration & National Marine Fisheries Service).〕 ==References==
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