species octopus genus described second subspecies discovered named distinctive membranes arms described similar members genera large body large eyes extensive membranes link octopus arms species single line arm head mantle arms covered reproductive habits extensively studied species believed region depth level despite species possessing large eggs extremely large species found indian_ocean coast south_africa species captured depths meters sea level study found species heavily concentrated meters sea level conservation status assessed taxonomy species octopus sole member genus belongs family order species discovered subspecies subspecies originally identified described genus species named distinctive membranes arms latin veil latin gown mantle description described specimen caught male looking similar genus larger membranes differently shaped differently shaped funnel organ specimen sac shaped body large eyes arms folded large membranes animal characteristic pale coloration summarized differences possession funnel organ composed separate pieces bend arm development extensive lateral membranes arms fully convinced shape arm value identifying species curve caused membrane comparing distinctive features known octopus species found similarities species genera considered synonym subfamily considered synonym subfamily found closest southern species having similar funnel organs species specimen head mantle dorsal arms covered varying sizes measured specimen mantle millimeters wide millimeters long specimen head wide mantle dominated large eyes measured millimeters wide millimeters long shaped pupils described arms developed noted dorsal arms longest arms got shorter moved ventral end single line arm described membranes arms detail stating arms bear dorsal ventral membranes ventral margins unusually large extend tip arms restricted ventral surface extend dorsal margin neighboring ventral arms continue tip weakly developed arm contains ink sac tiny contain ink common trait cephalopods live deep water little light subspecies described differs areas considered significant mantle specimen significantly wider long specimens smaller difference width length specimen having mantle identical width length length membrane links octopus arms umbrella shorter specimens additional specimens described specimen noted significant difference specimen specimens noted specimens appeared fully sexually developed looked comparatively owing difference overall size specimens difference specimens ages described coloring specimens deep reddish brown distinctly purple shade males darker brown female reproduction little known reproductive habits study focus high proportion immature females obtained survey low proportion mature females indicate spawning season finishing beginning autumn wide size range sampled population considerable number small individuals possibly days old suggests existence extended reproduction period analyzing eggs captured specimens study found low value females having large eggs males producing low number large largest reported deep sea member despite species deep sea inhabit habitat distribution specimen captured east coast africa depth meters sea level specimens described members separate subspecies caught coast modern coast south_africa depths meters meters according database possibly located waters north located south_africa spanish research vessel conducted study population coast study found populations entire study area ran coast especially high concentrations southern end coast waters near city study performed depth groups meters sea level found depth ranges abundant meters sea level study noted males common shallower groups females common deeper groups status conservation status assessed version
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