N. pourtalesi grows to a mantle length of 11 mm (given as "length to dorsal edge of mantle") and total length of 24 mm (given as "length to tip of longest sessile arm").[4]
^Finn, Julian (2016). "Nectoteuthis Verrill, 1883". World Register of Marine Species. Flanders Marine Institute. Retrieved 10 February 2018.
^Reid, A. & Jereb, P. (2005). "Family Sepiolidae" in P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 153–203.