Papers Published in Japanese Journal of Ichthyology
Vol. 67, No. 1, April 25, 2020
CONTENTS
Original Papers
First northwestern Pacific record of Thysanophrys randalli (Teleostei: Platycephalidae)
from Kochi Prefecture, Japan and morphological comparisons with T. chiltonae
Hiroyuki Motomura, Jumpei Taguchi, Hisashi Imamura and Mizuki Matsunuma
Personality differences in white-spotted char fry evident between habitats
Ryota Hasegawa, Hiroyuki Yamada, Chiaki Ishihara and Satoshi WadaFirst record of the longfin dragonfish, Bathophilus longipinnis (Stomiidae;
Melanostomiinae), from Japan
Akinori Teramura, Keita Koeda, Naomitsu Suzuki, Shotaro Hirase and Hiroshi Senou
First reliable records of Epinephelus craigi (Perciformes: Serranidae) from Japan andthe southern South China Sea, and a note on the standard Japanese name proposed
for E. stictus
Yuri Suzuki, Hiromitsu Endo, Hiroyuki Motomura, Hiroshi Senou and Mizuki
Matsunuma
Genetic population structure of Cobitis minamorii tokaiensis
Gen Ito, Yasunori Koya, Tokumasa Horiike and Takahiko Mukai
Multiplex PCR-based genotyping of mitochondrial DNA from two Gnathopogon species
found in the Lake Biwa system: its development and application to field-collected
eggs from the South Basin
Kohji Mabuchi, Kazuya Nishida and Makoto A. YoshidaFirst specimen-based Japanese record of Oxycheilinus arenatus (Perciformes: Labridae)
from the Ryukyu Islands
Yuna Dewa, You Sakurai, Jumpei Nakamura and Hiroyuki Motomura
First Pacific records of Sphyraena arabiansis (Perciformes: Sphyraenidae), with arevised species diagnosis and morphological comparisons with S. barracuda
Satoshi Morishita, Ryohei Miki, Hiroshi Senou and Hiroyuki Motomura

NotesRecords of Naso annulatus, N. brachycentron and N. lopezi from the northern East
China Sea and Sea of Japan
Yuki Tomimori, Akari Ogino, Yoshitaka Uchida, Yoshiaki Kai and Mizuki Matsunuma
First Japanese record of the pufferfish Takifugu flavidus (Tetraodontiformes:
Tetraodontidae), collected off Hagi, Yamaguchi Prefecture, Japan
Takayuki Sonoyama and Keiichi Matsuura
Records of Eustomias gibbsi (Stomiiformes: Stomiidae: Stomiinae) from Japan
Jinpei Ishikawa, Shinpei Ohashi, Fumiya Tanaka, Hidetada Kiyofuji and Naohide
Nakayama
Northernmost records of Neamia notula (Apogonidae) from Kushimoto, Wakayama
Prefecture, Japan
Tomohiro Yoshida, Kiyoshi Hagiwara and Hiroyuki Motomura
Record of a snake eel, Ophichthus sangjuensis (Anguilliformes: Ophichthidae), collectedfrom Osaka Bay, Japan
Yusuke Hibino and Yuki Kimura
Records and comments on current settlement of Microphis retzii in Ishigaki and
Iriomote Islands, the Ryukyu Islands, Japan
Shuya Kato, Tomoaki Maruyama, Naoto Inui, Akihiko Goto, Toshiyuki Suzuki andHiroshi Senou
Specimen-based records of Cephalopholis polleni (Perciformes: Serranidae) from Japan
Jumpei Nakamura, Ifue Fukuchi, Katsunori Tachihara and Hiroyuki Motomura
Fresh coloration and hyperostotic variations in Pterygotrigla cajorarori Richards andYato, 2012 (Triglidae)
Takuji Yato, Naohide Nakayama and Hiromitsu Endo

Original Papers
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp.1 –9
First northwestern Pacific record of Thysanophrys randalli (Teleostei: Platycephalidae)
from Kochi Prefecture, Japan and morphological comparisons with T. chiltonae
Hiroyuki Motomura*, Jumpei Taguchi, Hisashi Imamura and Mizuki Matsunuma
Abstract During an ichthyofaunal survey of southern Japan, a single specimen (74.9 mmstandard length; SL), collected at a depth of 8 m off Kashiwa-jima Island, Kochi Prefecture inJune 1992, was found in the fish collection of the National Museum of Nature and Science,
Tsukuba, Japan. The specimen was subsequently identified as a species of Thysanophyry
Ogilby, 1898, having the following combination of characters: dorsal surface of head lacking
tubercles, suborbital ridge with six distinct spines (including one preorbital spine), lateral-line
scales with two exterior openings posteriorly, ocular papillae absent, interopercular flap
absent, and well developed sensory tubes on upper cheek region. The specific identification as
T. randalli Knapp, 2013 was based on the short snout (length 10.1% of SL), a single preocularspine, no supraocular tentacles, the iris lappet without branches, interopercle expanded
posteroventrally, and six scale rows between the second dorsal-fin origin and lateralline. Thysanophyrys randalli having been recorded previously only from the western Indian
Ocean and Pacific Ocean north to Kiribati, the Kochi specimen represents the firstnorthwestern Pacific (including Japanese waters) and northernmost records of the species.
The species is compared in detail with the closely related congener Thysanophyrys
chiltonae Schultz, 1966. In Japanese waters, both species occur around the southern oceanicislands. The new standard Japanese name “Kokuchikuroshimagochi” is proposed for T.
randalli (“Kuroshimagochi” applied to T. chiltonae).
(*Corresponding author: The Kagoshima University Museum, 1–21–30 Korimoto,Kagoshima 890–0065, Japan; e-mail: motomura@kaum.kagoshima-u.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 11–24
Personality differences in white-spotted char fry evident between habitats
Ryota Hasegawa*, Hiroyuki Yamada, Chiaki Ishihara and Satoshi Wada
Abstract Animal personality, defined as consistent individual differences in behavior acrosstime and/or context, has been associated with individual dispersal tendencies in some species.
White-spotted char (Salvelinus leucomaenis) populations, often found in above-dam
watersheds in Japanese mountain streams, the dams preventing continuous distribution withlower stream reaches, were subject of a behavioral study comparing above-dam andopen-stream behavior of fry. Fries were collected from an above-dam area and two
open-stream areas within the Kame River system (southern Hokkaido), and personality
quantified by measuring a suite of behaviors, such being repeated two-month later.
Above-dam fry showed a shorter swimming duration against a novel object and mirror thanopen-stream fry. The latency time to catch food in above-dam fry tended to be longer thanthat of the latter. Swimming duration against a novel object and mirror were significantly
correlated when data for both groups combined, but not so when data for each group wereanalyzed independently. These results suggest that personality traits in white-spotted char fry
would be shaped by natural selection acting on each habitat, resulting in differing adaptive
personality traits.
(*Corresponding author: Graduate School of Environmental Science, Hokkaido University,
N10W5, Sapporo, Hokkaido 060–0810,Japan; e-mail: ryotahase344922@eis.hokudai.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 25–29
First record of the longfin dragonfish, Bathophilus longipinnis (Stomiidae;
Melanostomiinae), from Japan
Akinori Teramura*, Keita Koeda, Naomitsu Suzuki, Shotaro Hirase and Hiroshi Senou
Abstract A single specimen (124 mm in standard length) of the genus Bathophilus, trawledfrom 300 m in Suruga Bay, Japan on 30 January 2019, was identified as Bathophilus
longipinnis (Pappenheim, 1914), being characterized by the following combination ofcharacters: bases of pelvic fins equidistant between dorsal and ventral profiles; pectoral-fin
rays 8; pelvic-fin rays 10; ventral row of photophores from tip of isthmus to anal-fin origin
32; large lateral series photophores 25; vertebrae 45 (previously recorded range 40–44); headlength 17.3% in standard length (18.0–25.0%); body depth at origin of dorsal fin base 14.3%
in standard length. The circumglobal (Atlantic Ocean; Indian Ocean; southern Pacific Ocean:Australia; Central Pacific: Hawaiian Islands; western Pacific Ocean: South China Sea) species
has been previously recorded from the Kuroshio Current basin (20–38˚S, 138–152˚E),
although the detailed collection locality was not stated. There being no other records fromJapanese waters, the specimen from Suruga Bay represents the first unequivocal record of B.
longipinnis from Japan. The new standard Japanese name “Amanogawa-gingaeso” isproposed for the species.
(*Corresponding author: Fisheries Laboratory, Graduate School of Agricultural and Life
Sciences, The University of Tokyo, Bentenzima, Maisaka, Nishi, Hamamatsu, Shizuoka 2971–
4, Japan; e-mail: akifishes@yahoo.co.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 31–40
First reliable records of Epinephelus craigi (Perciformes: Serranidae) from Japan andthe southern South China Sea, and a note on the standard Japanese name proposed forE. stictus
Yuri Suzuki, Hiromitsu Endo, Hiroyuki Motomura, Hiroshi Senou and Mizuki Matsunuma*
Abstract Serranid specimens collected from Tosa Bay, Kochi Prefecture, Japan (1specimen) and the South China Sea [Gulf of Tonkin, off Vietnam, Riau Islands (Indonesia)
and Borneo] (10 specimens) were identified as Epinephelus craigi, previously been known

only from Taiwan and China. The species is characterized by five dark vertical bands bisectedby a longitudinal series of squarish blotches on the body, numerous small black spots
scattered on the lateral and dorsal portions of the head and anterior body, a longitudinal darkband behind the eye and on the upper opercle, the soft-rayed portion of the dorsal fin, analand caudal fins without black margins, 46–57 pored lateral-line scales, and 81–95 longitudinal
series scale rows. Previous Japanese records of Epinephelus stictus Randall and Allen, 1987
(now restricted to Australia and Indonesia) and Epinephelus diacanthus (Valenciennes inCuvier and Valenciennes, 1828) (northern Indian Ocean) are considered to have been
misidentifications. The present specimens represent the first specimen-based records of E.
craigi from Japan and the southern South China Sea (Vietnam, Riau Islands and Borneo). The
new standard Japanese name Sumitsuki-aohata is proposed for E. craigi. The standard
Japanese name Aohata-modoki should be applied for E. stictus.
(*Corresponding author: Department of Environmental Management, Faculty ofAgriculture, Kindai University, 3327–204 Nakamachi, Nara 631–8505, Japan; e-mail:matsunuma@nara.kindai.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 41–50
Genetic population structure of Cobitis minamorii tokaiensis
Gen Ito*, Yasunori Koya, Tokumasa Horiike and Takahiko Mukai
Abstract An examination of the genetic population structure of Cobitis minamorii
tokaiensis in central Honshu Japan, based on mitochondrial DNA nucleotide sequences in thecytochrome b region, revealed that the subspecies is subdivided into three regions(West-Shizuoka, Mie, and Aichi-Gifu) on the evidence of haplotype distribution and pairwise
Φst among populations. However, the phylogenetic analyses indicated that the haplotypes inthe three regions belong to the same haplotype group, suggesting that C. m. tokaiensis
dispersed following the interconnection of paleo-river systems within relatively recent
geological time, and subsequently differentiated in several areas. Because of its genetic
characteristics, the three regions are important for conservation of the subspecies’ genetic
diversity.
(*Corresponding author: The United Graduate School of Agricultural Science, Gifu
University, 1–1 Yanagido, Gifu 501–1193, Japan; e-mail: t6101001@edu.gifu-u.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 51–65
Multiplex PCR-based genotyping of mitochondrial DNA from two Gnathopogon species
found in the Lake Biwa system: its development and application to field-collected eggs
from the South Basin
Kohji Mabuchi*, Kazuya Nishida and Makoto A. Yoshida
Abstract The endemic Lake Biwa species Gnathopogon caerulescens has become severely
endangered since the 1990s due to deterioration of its spawning habitat, much of which was inthe South Basin of the lake. To aid in the conservation of the species, a rapid molecularmethod was devised for discriminating it from a sympatric congener, Gnathopogon elongatus,
widely distributed in western Japan. Three allele-specific primers were developed for the
mitochondrial cytochrome b gene regions of three lineages of the two species: Cytb465hon_c
for G. caerulescens, and Cytb315tam_e1 and Cytb246tam_e2 for the E1 and E2 lineages,
respectively, of G. elongatus. Using the same reverse primer (Cytb522R), the specific primers
for G. caerulescens and the E1 and E2 lineages of G. elongatus were designed to amplify ca.
80-, 230-, and 310-bp fragments, respectively. Multiplex PCR reactions including these four
primers produced species/lineage-specific fragments. Although false fragments sometimes
appeared, they did not affect discrimination between the two species. To demonstrate theefficacy of this method, field-collected eggs were analyzed, a total 1,238 eggs being collectedfrom 37 egg populations on submerged roots of Salix trees (the spawning substrate preferredby G. caerulescens) on the coast of the South Basin between 18 April and 16 May 2019.
Analysis of 298 eggs (approximately equal samples from each population) using a published
DNA method resulted in 249 being successfully sorted into the genera Gnathopogon (206eggs), Carassius (33), and Cyprinus (10). Subsequent analysis of the Gnathopogon eggs with
our method detected 185 G. caerulescens and three G. elongatus (E1) eggs, 18 being
unidentified. G. caerulescens eggs were included in 32 of the 37 egg populations fromthroughout the South Basin, except the southernmost region, indicating that the geographic
distribution of spawning sites of the species is rapidly recovering to pre-1960s levels (basedon literature estimates).
(*Corresponding author: NIES Lake Biwa Branch Office, National Institute forEnvironmental Studies, 5–34 Yanagasaki, Otsu, Shiga 520–0022, Japan; e-mail:mabuchi.koji@nies.go.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 67–71
First specimen-based Japanese record of Oxycheilinus arenatus (Perciformes: Labridae)
from the Ryukyu Islands
Yuna Dewa, You Sakurai, Jumpei Nakamura and Hiroyuki Motomura*
Abstract The Indo-Pacific labrid genus Oxycheilinus Gill, 1862 includes 10 valid species,
seven having been recorded from Japanese waters on the basis of collected specimens. A
single specimen (157.8 mm standard length) of the Speckled Maori Wrasse Oxycheilinus
arenatus (Valenciennes, 1840), collected from the Ryukyu Islands, Japan in March 2019,possessed the following characters: a large black basal blotch on the interspinous membranes
between the first and fourth dorsal-fin spines; a distinct black longitudinal band from behindthe eye to the caudal-fin base; and no black blotch on the body above the pectoral fin.
Although widely distributed in the Indo-Pacific, except for the Hawaiian Islands, O. arenatus
has been recorded in Japanese waters only from photographs and no Japanese specimens havebeen found in museum collections. To confirm the collected specimen’s status as the first
specimen-based Japanese record of the species, the seven congeners previously recorded from

Japan were re-examined. One of these, O. oxyrhynchus was recorded from Japan in 1897 on
the basis of two specimens, with no further Japanese specimens reported. Examination ofthese specimens revealed them to be identical with O. celebicus (also previously recorded
from Japan), although a modified illustration (based on original illustration of O.
oxyrhynchus) reported as O. oxyrhynchus by subsequent Japanese publications is very similar
to O. arenatus in overall body appearance. The Ryukyu specimen represents the first
specimen-based record of O. arenatus from Japan. The new standard Japanese name‘‘Hiiromochinouo’’ is proposed for the species.
(*Corresponding author: The Kagoshima University Museum, 1–21–30 Korimoto,Kagoshima 890–0065, Japan; e-mail: motomura@kaum.kagoshima-u.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 73–83
First Pacific records of Sphyraena arabiansis (Perciformes: Sphyraenidae), with arevised species diagnosis and morphological comparisons with S. barracuda
Satoshi Morishita, Ryohei Miki, Hiroshi Senou and Hiroyuki Motomura*
Abstract Five large specimens (648.5–1162.9 mm standard length) of Sphyraena
arabiansis Abdussamad and Retheesh in Abdussamad et al., 2015, previously known only
from Lakshadweep, southeastern Arabian Sea, Indian Ocean, but recently collected fromsouthern Japan (Kanagawa, Miyazaki, and Kagoshima prefectures) and off the south coast of
New Caledonia, represent the first records of S. arabiansis from the Pacific Ocean. Sphyraena
arabiansis is very similar to S. barracuda Edwards, 1771, both species sharing dark lateralbody bars not extending onto the abdomen, whitish upper and lower caudal-fin tips, a pair oflobes on the caudal-fin central margin, and slightly elongated posteriormost rays of the second
dorsal and anal fins. A re-assessment of currently recognized diagnostic characters of S.
arabiansis confirmed scale row counts, branchiostegal membrane coloration, the presence orabsence of body blotches, and location of body bars as valid for separating the two species. In
addition, interorbital width and maxilla position distinguish between the species in specimens> 800 mm SL and 280 mm SL, respectively. Newly recognized diagnostic characters of S.
arabiansis include numbers of total lateral-line scales, and upper and lower preopercular scalerows, and caudal-peduncle length. Revised diagnoses are given for S. arabiansis and S.
barracuda and the new standard Japanese name ‘‘Yasha-kamasu’’ proposed for the former.
(*Corresponding author: The Kagoshima University Museum, 1–21–30 Korimoto,Kagoshima 890–0065, Japan; e-mail: motomura@kaum.kagoshima-u.ac.jp)

Notes
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 85–93
Records of Naso annulatus, N. brachycentron and N. lopezi from the northern East
China Sea and Sea of Japan

Yuki Tomimori, Akari Ogino, Yoshitaka Uchida, Yoshiaki Kai and Mizuki Matsunuma*
Abstract Naso annulatus Quoy and Gaimard, 1824 (Perciformes: Acanthuridae) is newly
recorded from Fukue-jima Island (32˚41'24″N, 128˚45'14″E; Nagasaki Prefecture), northern
East China Sea, Japan, based on single specimen [531.5 mm standard length (SL)]. In
addition, N. brachycentron Valenciennes, 1835 (345.1 mm SL) and N. lopezi Herre, 1927
(453.9 mm SL) are both recorded from O-shima Island (34˚30'30″N, 131˚25'12″E;
Yamaguchi Prefecture), Japan, each on the basis of a single specimen. The record of N.
brachycentron is the first specimen-supported record of the species from the Sea of Japan. All
three species are considered to be important evidence of adult (>300 mm SL) unicornfishes
having been transported by the Tsushima Warm Current from a more southern region to thenorthern East China Sea and Sea of Japan.
(*Corresponding author: Department of Environmental Management, Faculty ofAgriculture, Kindai University, 3327–204 Nakamachi, Nara 631–8505, Japan; e-mail:matsunuma@nara.kindai.ac.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 95–99
First Japanese record of the pufferfish Takifugu flavidus (Tetraodontiformes:
Tetraodontidae), collected off Hagi, Yamaguchi Prefecture, Japan
Takayuki Sonoyama* and Keiichi Matsuura
Abstract Takifugu flavidus (Li, Wang and Wang in Cheng et al., 1975) has been treated as aJapanese species by previous Japanese authors, despite the lack of any specimen-based
records of the species from Japanese waters. However, an example of T. flavidus, collected
off Hagi, Yamaguchi Prefecture, Japan was recently found in the fish collection of the Hagi
Museum, Yamaguchi Prefecture. The species is distinguished from all congeners by thefollowing combination of characters: dorsal and ventral spinule-covered areas not connected;
body dark brown with white spots dorsally; an elliptical black blotch edged with white behindthe pectoral fin.
(*Corresponding author: Shimonoseki Marine Science Museum, 6–1 Arcaport, Shimonoseki,
Yamaguchi 750–0036, Japan; e-mail: sonoyama@kaikyokan.com)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 101–106
Records of Eustomias gibbsi (Stomiiformes: Stomiidae: Stomiinae) from Japan
Jinpei Ishikawa, Shinpei Ohashi, Fumiya Tanaka, Hidetada Kiyofuji and Naohide Nakayama*
Abstract Six specimens (101–152 mm standard length, SL) of the dragonfish Eustomias
gibbsi Johnson and Rosenblatt, 1971 were collected from off Okinotori-shima Island, Japan,
at depths of 110–160 m. The species is distinguished from its congeners by the following
combination of characters: pectoral fin well developed, with 3 soft rays; pelvic fin with 7 softrays; no prominent midventral groove posterior to pectoral-fin bases; barbel lacking external
pigment nor row of black spots; barbel length 24.9–52% SL; terminal bulb single, unbranchedbasally, with black cap covering its base; terminal filament single, without bulbs or filaments;
second mandibular teeth longer than first; and short posteriorly directed projection on anterior
margin of fleshy orbit. Although one of the paratypes of E. gibbsi was collected within theJapan’s EEZ, the record has been overlooked by subsequent Japanese authors. The newstandard Japanese name “Kanmuri-hoshieso” is proposed for the species.
(*Corresponding author: Department of Marine Biology, School of Marine Science andTechnology, Tokai University, 3–20–1 Orido, Shimizu, Shizuoka 424–8610, Japan; e-mail:gadiformes@gmail.com)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 107–110
Northernmost records of Neamia notula (Apogonidae) from Kushimoto, Wakayama
Prefecture, Japan
Tomohiro Yoshida*, Kiyoshi Hagiwara and Hiroyuki Motomura
Abstract Six specimens (20.6–30.7 mm standard length) of the rare Indo-West PacificGillspot Cardinalfish, Neamia notula Fraser and Allen, 2001 (Apogonidae) were collectedfrom a beach (after having been stranded following strong southerly winds) at Sabiura,
Kushimoto, Wakayama Prefecture, Japan on 1 March 1982. Japanese examples of the species
having been recorded only from Kashiwa Island (Kochi Pref.), Uchinoura Bay (Kagoshima
Pref.), and Senaga, Okinawa Island (Okinawa Pref.), the Wakayama specimens represent thenorthernmost record of the species.
(*Corresponding author: Seikai National Fisheries Research Institute, Japan Fisheries
Research and Education Agency, 1551–8 Taira-machi, Nagasaki 851–2213, Japan; e-mail:k5299534@kadai.jp)
Japanese Journal of Ichthyology
Vol. 67, No. 1, pp. 111–115
Record of a snake eel, Ophichthus sangjuensis (Anguilliformes: Ophichthidae), collectedfrom Osaka Bay, Japan
Yusuke Hibino* and Yuki Kimura
Abstract A single specimen (515.5 mm of total length) of a snake eel, Ophichthus
sangjuensis (Ji and Kim, 2011), collected from Osaka Bay, eastern Seto Inland Sea, Japan,
represents the second Japanese record and easternmost record of the species. Although thenumber of mandibular pores, one of the diagnostic characters of the species has been known
as five, the present specimen has six on the left side and five on the right side. We consider
the condition is an intraspecific variation.
(*Corresponding author: Kitakyushu Museum of Natural History and Human History, 2–4–
1 Higashida, Yahatahigashi-ku, Kitakyushu, Fukuoka 805–0071, Japan; e-mail:yusukeelology@gmail.com)
Japanese Journal of Ichthyology

Vol. 67, No. 1, pp. 117–122
Records and comments on current settlement of Microphis retzii in Ishigaki and
Iriomote Islands, the Ryukyu Islands, Japan
Shuya Kato*, Tomoaki Maruyama, Naoto Inui, Akihiko Goto, Toshiyuki Suzuki and Hiroshi
Senou
Abstract Eighteen specimens of the pipefish Microphis retzii were collected from several
rivers on Iriomote and Ishigaki Islands (Yaeyama Islands, Ryukyu Islands, Japan) from 1990
to 2019. The records from Iriomote Island, including variously sized specimens plus brooding
males over multiple years, suggest established settlement of the species. The records from
Ishigaki Island, being the first specimen-based records of the species from that locality, aresuggestive of a new settlement. Accordingly, M. retzii should be treated as a Japanese resident
species, rather than one subject to abortive migration, making them eligible for evaluation of
red lists in Japan.
(*Corresponding author: Fisheries Laboratory, Graduate School of Agricultural and Life
Sciences, The University of Tokyo, 2971–4 Bentenjima, Maisaka, Nishiku, Hamamatsu,
Shizuoka, 431–0214 Japan; e-mail: tumagroikekatuo142@gmail.com)
Vol. 67, No. 1, pp. 123–128
Specimen-based records of Cephalopholis polleni (Perciformes: Serranidae) from Japan
Jumpei Nakamura, Ifue Fukuchi, Katsunori Tachihara and Hiroyuki Motomura*
Abstract Two specimens (227.8–251.7 mm standard length) of the rare grouper
Cephalopholis polleni (Bleeker, 1868) were collected off Okinawa-jima and Ishigaki-jimaislands, Ryukyu Islands, the species having previously been known from scattered insular
localities in the Indo-Pacific Ocean, including the Ryukyu Islands between the Amami and
Yaeyama Islands. Although a single specimen of C. polleni had been previously obtained
from a fish market in Naha, Okinawa-jima Island, its capture locality was unknown and thespecimen is now apparently lost. All other Japanese records of the species were based solely
on photographs. Accordingly, the present specimens of C. polleni, described here in detail,from Okinawa-jima and Ishigaki-jima islands represent important specimen-based records ofthe species from Japan, being the first with precise locality data. A review of previous
distribution records of C. polleni from Japanese waters is also provided.
(*Corresponding author: The Kagoshima University Museum, 1–21–30 Korimoto,Kagoshima 890–0065, Japan; e-mail: motomura@kaum.kagoshima-u.ac.jp)
Vol. 67, No. 1, pp. 129–135
Fresh coloration and hyperostotic variations in Pterygotrigla cajorarori Richards andYato, 2012 (Triglidae)
Takuji Yato*, Naohide Nakayama and Hiromitsu Endo
Abstract The original description of Pterygotrigla cajorarori Richards and Yato, 2012,
based on eight specimens from the western Pacific Ocean, including one Japanese specimen,
indicated hyperostosis in the rostral projection, head bones (infraorbital, frontal, and parietal),post temporal spine, humeral spine, and the 2nd–4th first dorsal-fin spines, althoughvariations in these characters were poorly documented. Thirteen specimens (including twoparatypes) of P. cajorarori collected from southern Japan, the South China Sea, and Indonesia
were found to vary individually in the degree of hyperostosis in the rostral projection,
mesethmoid, lateral ethmoid, frontal, sphenotic, pterotic, and infraorbital bones, whereas thecondition was not prominent in the parietal and posttemporal bones, or the humeral spines.
However, hyperostosis was newly found in the 5th and 6th dorsal-fin spines and pelvic-fin
spine. A detailed description of fresh coloration (previously unknown) in P. cajorarori is also
given.
(*Corresponding author: Hyogo Prefectural Kobe High School, 1–5–1 Shironoshitadori,Nada, Kobe, Hyogo 657–0804, Japan; e-mail: ichthy-hobo_yt_@hi-net.zaq.ne.jp)