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A larva of Coryphaenoides pectoralis (Gadiformes: Macrouridae) collected by deep-sea submersible from off Hokkaido, Japan |
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| Authors: | Hiromitsu Endo Naohide Nakayama Kishiko Suetsugu Hiroshi Miyake |
| Institution: | 1. Laboratory of Marine Biology, Faculty of Science, Kochi University, 2-5-1 Akebono-cho, Kochi, 780-8520, Japan 2. Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano-ku, Tokyo, 164-8639, Japan 4. Ministry of the Environment, Government of Japan, 1-2-2 Kasumigaseki, Chiyoda-ku, Tokyo, 100-8975, Japan 3. School of Marine Biosciences, Kitasato University, 160-4 Utou, Okirai, Sanriku, Ofunato, Iwate, 022-0101, Japan |
| Abstract: | A late-stage larva of Coryphaenoides pectoralis was first observed in situ and subsequently collected by the deep-sea submersible “Shinkai 2000” from mesopelagic waters at a depth of 530 m off Hokkaido, Japan. The larva (14.5 mm in head length, 149+ mm in total length) has fan-like pectoral fins, elongate first dorsal fin, pelvic fin and tail, 10 first dorsal rays (including 2 pseudospines), and 7 pelvic fin rays, 6 branchiostegal rays, no light organ, anus just anterior to anal fin origin, 2 retia and gas glands, 14 abdominal vertebrae, and previously reported larval pigmentation. Counts of second dorsal and anal fin rays, and caudal vertebrae, are reported for the first time. |
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