伊豆大島から得られた北半球初記録のゴンベ科魚類Cirrhitichthys guichenotiキリンゴンベ（新称）の記載と日本における生息状況

抄録

During an ichthyofaunal survey of Sagami Bay (Japan) and surrounding waters, a single hawkfish specimen (55.7 mm standard length: SL) was collected from Izu-oshima Island, Izu Islands by handnet at a depth of 35 m on 7 December 2011. The specimen was subsequently identified as Cirrhitichthys guichenoti (Sauvage, 1880), having the following combination of characters: dorsal-fin rays X, 13; anal-fin rays III, 7; pectoral-fin rays 16, uppermost and lower six rays unbranched; lateral-line scales 52; horizontal scale rows between base of middle dorsal-fin spinous portion and lateral line 4; gill rakers 5 + 12; greatest body depth 31.1% of SL; snout length 35.6% of head length; enlarged canine teeth on front of upper jaw and central part of lower jaw; and lateral surface of body white with large brownish-red blotches when fresh. This species has been previously recorded from Indonesia, Mauritius, Réunion, Madagascar, Comoros and South Africa, the present specimen from Izu-oshima Island representing the first specimen-based record from the northern hemisphere and northernmost record for the species. Seventeen underwater observations (photographic and visual) from 8 November 2011 to 25 May 2021 of juvenile and adult (ca. 35–100 mm in total length) C. guichenoti, documented from Izu Peninsula, Izu-oshima Island, and Chichi-jima Islands, Ogasawara Islands, and encompassing both the coldest and hottest seasons, suggest that the population is established and reproducing in Japanese waters. The new standard Japanese name “Kiringombe” is proposed for the species, based on the present specimen.