Asperoteuthis lui is a large chiroteuthid; the largest known specimen has a mantle length of 363 mm. The tentacles of this species are long and slender, with the longest intact tentacles extending 2065 mm. This species is known from a small number of specimens, none of which were fully intact and the smallest was 175 mm ML (however, see "Nesis's new chiroteuthid species"). It appears to have a circumglobal distribution in the high latitudes of the Southern hemisphere.
Asperoteuthis lui differs from other members of the genus by:
1. Club with >> 100 suckers.
2. Club suckers with 5-7 sharp, conical teeth.