1. Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan
2. Marine Works Japan, Ltd., 3-54-1 Oppamahigashi, Yokosuka, Kanagawa 237-0063, Japan
3. National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan