Marine cephalopod mollusc with mantle robust, widest at midpoint between anterior end and beginning of fins; tail not sharply pointed. Fin angle moderate, 40° to 50° mostly 45° ; fin width greater than fin length. Head small, short and narrow. Arms relatively short, of about equal length in both sexes; hectocotylized arm (in males) shorter than the opposite ventral arm (IV), its modified portion very short, about 22% of arm length. Colour: reddish-brown to deep purple, more intense on head, arms and dorsal surface of mantle and fins; paler on ventral surfaces; a brilliant yellowish-green tint. Maximum mantle length 31 cm.
- Area 21: the Northwestern part of the Atlantic Ocean
- Area 27: the Northeastern part of the Atlantic Ocean
- Area 31: the Western part of the Atlantic Ocean
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