Supplementary data for: Oktoalethis neptunus n. gen., n. sp. (Cephalopoda: Idiosepiidae)

This record contains supplementary materials associated with the manuscript: Sato N. et al. A new pygmy squid, Oktoalethis neptunus n. gen., n. sp. (Cephalopoda: Idiosepiidae) from offshore waters of Okinawa Island, Japan. Supplementary files include: Supplementary Table S1. Morphological measurements and specimen data. Supplementary Video S1. Swimming behaviour of Oktoalethis neptunus n. gen., n. sp. Supplementary Video S2. Close-up view of locomotion and body posture. These materials are provided to support the findings of the manuscript submitted to Zootaxa.