Central Annals of Marine Biology and Research Bringing Excellence in Open Access Research Article *Corresponding author Tsunemi Kubodera, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba-shi, Ibaraki 305-005, How the Giant Squid, Japan; Tel: 81-29-853-8344 Fax: 81-29-853-8998; Email:
[email protected] Architeuthis Dux, Maneuver Submitted: 07 January 2021 Accepted: 09 March 2021 Published: 31 March 2021 Long Tentacles for Hunting Copyright © 2021 Kubodera T, et al. Tsunemi Kubodera1*, Yasuhiro Koyama2 and Wen-Sung Chung3 1Curator Emeritus, National Museum of Nature and Science, Japan ISSN: 2573-105X 2Executive Producer, NHK ENTERPRISES (NEP), Department of Nature & Science OPEN ACCESS Program, Japan 3Queensland Brain Institute, The University of Queensland, Australia Keywords • Mesopelagic habitat Abstract • Twilight zone • Giant squid Having a large body, long tentacles, sharp beak and sucker ring teeth to battle against • Hunting behaviour a sperm whale in deep water makes the giant squid, Architeuthis dux, capture imaginations • Tentacles and constantly fire debate and interest. The hunting strategy of the giant squid in the twilight realm, particularly how to manipulate the soft and long tentacles (e.g.>5m length of a sub- adult), to catch prey, remains largely unknown. Here we present the first in situ behavioural observation of the tentacular strike of the giant squid which attempted to capture the artificial bioluminescent lure in its natural habitat (800 m depth), off Australian waters. Firstly, this footage confirmed that two long tentacles can be firmly held together by extensive paired locking apparatus (smooth-ringed suckers and knobs), along the tentacular stalks.