Winter squid

Marine cephalopod mollusc with long mantle, moderately slender, cylindrical and conical at the posterior end, variable color with brown, red, purple and yellow mottling. Abnormally large eyes covered by a transparent membrane. The diameter of the externally visible eyeball is 8 to 18% of the length of the mantle. It has eight tentacles that are about half the length of the mantle, while the pair of tentacles appendages is about two-thirds of its length. Left ventricle arm hectocotolized in males. Rhomboidal fins on each side of the rear end and measuring approximately half the length of the mantle.