Rugose Hooked Squid
Encyclopedia
The Rugose Hooked Squid (Onykia robsoni) is a species of squid
in the family Onychoteuthidae. It occurs in the Antarctic Ocean
, at an estimated depth of 250–550 meters. The mantle
of this species grows to a length of 75 cm. The species has been suggested as a junior synonym of the Tropical Clubhook Squid
(Onykia carriboea), due to similarities between the species.
Squid
Squid are cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms arranged in pairs and two, usually longer, tentacles...
in the family Onychoteuthidae. It occurs in the Antarctic Ocean
Southern Ocean
The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...
, at an estimated depth of 250–550 meters. The mantle
Mantle (mollusc)
The mantle is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.In many, but by no means all, species of molluscs, the epidermis of the mantle secretes...
of this species grows to a length of 75 cm. The species has been suggested as a junior synonym of the Tropical Clubhook Squid
Tropical Clubhook Squid
The Tropical Clubhook Squid is a squid in the family Onychoteuthidae, the type species of the genus Onykia. It is known with certainty only from immature specimens. The type locality of O. carriboea is the Gulf of Mexico...
(Onykia carriboea), due to similarities between the species.