About the Authors

Taketeru Tomita

teruteru-saurus@hotmail.co.jp

Affiliation Hokkaido University Museum, Hakodate, Hokkaido, Japan

Masaru Nakamura

Affiliation Okinawa Churashima Research Center, Okinawa Churashima Foundation, Motobu, Okinawa, Japan

Keiichi Sato

Affiliation Okinawa Churashima Research Center, Okinawa Churashima Foundation, Motobu, Okinawa, Japan

Hiroko Takaoka

Affiliation Okinawa Churaumi Aquarium, Motobu, Okinawa, Japan

Minoru Toda

Affiliation Okinawa Churashima Research Center, Okinawa Churashima Foundation, Motobu, Okinawa, Japan

Junro Kawauchi

Affiliation Graduate School of Fisheries Science, Hokkaido University, Hakodate, Hokkaido, Japan

Kazuhiro Nakaya

Affiliation Hokkaido University, Hakodate, Hokkaido, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TT MN. Performed the experiments: TT MN. Analyzed the data: TT MN. Contributed reagents/materials/analysis tools: KS HT MT JK KN. Contributed to the writing of the manuscript: TT.