Description:-
Fresh specimens whitish with dark brown chromatophores on the dorsal side. Chromatophores on ventral side concentrated medially in the form of a thin line (Fig. 26b). Specimens preserved in formalin reddish with dark brown chromatophores. Mantle long, thick, muscular and blunt posteriorly. ). Fins large, rhombic, with anterior margin slightly convex and the posterior margin slightly concave and slightly more than the half of mantle length. Head comparatively small and short. Eyes large and prominent. Buccal membrane with 7 lappets, each lappet bears 8–12 minute suckers. Funnel small, placed in a deep furrow beneath the head. Arms slender and short; arm formula varies, III>II>IV>I or III>IV>II>I. Third pair of arms longer and stout. Left ventral arm of male hectocotylized for 40–45% of its length, suckers modified in to two rows of uniform, cone-shaped pointed fleshy papillae bearing minute suckers on their tips; papillae on the ventral row slightly larger than those of dorsal row, 10–15 pairs of normal suckers present on the proximal part. Arm suckers biserial, medium sized, larger on arm II and III; chitinous sucker rings smooth or wavy proximally and 8–9 plate-like squared teeth distally. Tentacles moderately long, slender and compressed Tentacular club short, suckers quadriserial, median rows of suckers larger than marginal rows. Gladius very narrow and slender, with almost straight lateral margins along the vane.
References:-
Sreeja, V. (2013). Taxonomy and diversity of cephalopods (Mollusa: Cephalopoda) of Kerala coast. PhD Thesis submitted to University of Kerala, India.