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First records of small-sized young giant squid Architeuthis dux from the coasts of Kyushu Island and the south-western Sea of Japan

Published online by Cambridge University Press:  20 October 2015

Toshifumi Wada*
Institute of Natural and Environmental Sciences, University of Hyogo, Yayoigaoka 6, Sanda, Hyogo 669-1546, Japan
Tsunemi Kubodera
National Museum of Nature and Science, Collection Center, Amakubo 4-1-1, Tsukuba city, Ibaragi 305-0005, Japan
Morihiko Yamada
Kagoshima City Aquarium, Honkoshin-machi 3-1, Kagoshima city, Kagoshima 892-0814, Japan
Hiroyoshi Terakado
Shimane Prefectural Fisheries Technology Center, Setogashima-cho 25-1, Hamada city, Shimane 697-0051, Japan
Correspondence should be addressed to: T. Wada, Institute of Natural and Environmental Sciences, University of Hyogo, Yayoigaoka 6, Sanda, Hyogo 669-1546, Japan email:
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Three individuals of small, young giant squid Architeuthis dux were caught in or near Japanese coastal waters during April–June 2013. The first occurrence of a young individual of 140.8 mm dorsal mantle length with a total weight of 44.81 g was recorded on the coast off Uchinoura, Kagoshima, Kyushu Island, southern Japan. The remaining two young individuals, both measuring 332.0 mm in dorsal mantle length with total weights of 390.63 and 356.95 g respectively, were caught on the coast off Hamada, Shimane, south-western Sea of Japan. Most morphological traits of all the specimens were consistent with those of A. dux, which was supported by further genetic analysis. Here we present some morphological traits of young giant squids with morphometric data and photographs.

Research Article
Copyright © Marine Biological Association of the United Kingdom 2015 

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