From Young, 1972:
- Arms
- I: 32-39% of ML (subadults).
- III: 47-61% of ML (subadults).
- IV: 121-135% of ML (subadults).
- I: 24-25% of ML (adults).
- II-IV 29-39% of ML (adults).
- Arm suckers
- Tentacular clubs
- Photophores
- Absent
- Funnel
- Fins
- Length 23-33% of ML.
Illustrations
- Largest arm suckers from: A- Arm I. B- Arm II. C- Arm III. D- Arm IV (ML 27 mm).
- Club sucker and club (ML 27 mm).
- Funnel locking-apparatus (ML 27 mm). All illustrations from Young, 1972.