Females are known to reach a mantle length of at least 59 mm.

They have large round finds, which often constitute 20-30% of the entire mantle length.

The arms are about 60% of the size of the mantle length.

They grow to 59 and 58 mm in mantle length, respectively.

The mantle length of males is 140 mm, and 150mm in females.

The body diameter was around 12 to 14% of the mantle length.

Most species have a mantle length ranging from 3-13 cm.

It is known to reach a mantle length of 9 cm.

The type specimens measure up to 27 mm in mantle length.

The largest species reach a mantle length of about 78 cm.