It attains a mantle length of at least 85 cm and probably over 1.15 m. The largest complete specimen of this species, measuring 2.3 m in total length, was found in Antarctica in 2000.
This species can grow to be at least 85 cm long and probably longer than 1.15 meters. In 2000, the largest complete example of this species, which measured a total of 2.3 meters in length, was found in Antarctica.