Tentacle clubs expanded, with numerous minute suckers, 15-20 in each row; arms with 4 rows of armature, the outer rows with suckers, the inner rows with hooks on all but the ventral arm pair; arms nearly equal in length, and the left ventral arm of the male not modified for spermatophore transfer; membrane over the eyes perforated; width of fins greater than their length; mantle length up to 30 cm (specimens collected at floating docks are usually small, with a mantle length of less than 10 cm)
Tentacle clubs narrow, the suckers large and in 4 rows; arms with 2 rows of suckers, without hooks; arms of unequal length, the ventral pair long and broad, and the left ventral arm of the male modified for spermatophore transfer; eyes covered by a continuous membrane (cornea); length of fins equal to their width; mantle length not exceeding 19 cm