The mantle of the musky octopus is smooth or thinly granulose. The head is wider than the mantle. The arms are much longer than in Eledone cirrhosa. The third right arm of males functions as a hectocotylus; it is shorter than the other arms and has a small ligula. There is one row of suckers on each arm. It has 11 to 12 external gills.
The colour is brownish-grey with large black spots. |
