Papers Published in Japanese Journal of Ichthyology

Vol. 64, No. 2

November 25, 2017

CONTENTS
Original Papers
Distribution and color variations of Carassius auratus in the Amami-Ryukyu Islands,
Japan
Yuichi Kano, Mikumi Takada-Endo, Tomomi Yamashita, Wataru Tanaka,
Akihiko Koyama and Kazuki Kanno
First Japanese record of Acanthopagrus taiwanensis (Perciformes: Sparidae) from
Kagoshima Prefecture
Kyoji Fujiwara, Masahide Itou and Hiroyuki Motomura
Interacting effects of lure color and turbidity on foraging response by rainbow trout(Oncorhynchus mykiss)
Kouki Nishidai and Atsushi Maruyama
Records of the anthiine fish Plectranthias sheni from Japan and proposal of a new
standard Japanese name
Kyoji Fujiwara, Satokuni Tashiro, Mayumi Takayama, Hiroshi Senou andHiroyuki Motomura
Extent of genetic introgression in wild populations of minami-medaka in the
Nogawa River, Tokyo, Japan
Ryohei Nakao, Yuka Iguchi, Xiangying Zhou, Sakurako Kamide, Tadao Kitagawa
and Makito Kobayashi
First specimen-based record of the haemulid fish Diagramma melanacrum(Actinopterygii: Perciformes) from JapanTaiga Naito, Takeshi Yamakawa and Hiromitsu Endo

Fish assemblage associated with a spring macroalgal bed off western Nishi-Sonogi
Peninsula, Nagasaki, Japan
Tatsuru Kadota, Setuo Kiyomoto, Masahiro Nakagawa, Kousuke Yatsuya andTaku YoshimuraFirst records of the electric ray Tetronarce formosa (Torpediniformes:
Torpedinidae) from Japan, with a revised species’ diagnosis and comparisonswith congeners
Ayumi Bandai, Mizuki Matsunuma and Hiroyuki Motomura
First Japanese record of Conocara fiolenti (Alepocephalidae) collected from
Hyuga-nada, Japan
Munehiro Takami, Hiromitsu Endo and Atsushi Fukui
First Japanese record of Paraheminodus kamoharai (Peristediidae) from Kochi,
Japan
Toshio KawaiFirst record of the liparid fish Careproctus zachirus from Japan
Koji Matsuzaki, Harutaka Taira, Toshiaki Mori, Takahiro Nobetsu and Kaoru Kido

Notes
First records of Plectranthias xanthomaculatus (Serranidae: Anthiinae) from
Okinawa and Kochi prefectures, southern Japan, with notes on ontogenetic
morphological changes
Mizuki Matsunuma, Makoto Okamoto, Takeshi Yamakawa and Hiromitsu Endo
A second record of Mola sp. A (Ushi-manbo), from the Sea of Japan and first record
from Toyama Prefecture, Japan
Etsuro Sawai, Yusuke Yamanoue, Tomoharu Kimura and Osamu Inamura
Second Japanese record of Plectranthias wheeleri (Perciformes: Serranidae)
from Suwanose-jima island, Tokara Islands, Kagoshima Prefecture, southern
Japan
Satokuni Tashiro, Mayumi Takayama and Hiroyuki Motomura
First record of juvenile spotted scat Scatophagus argus from the Matsukawa-ura
lagoon, Fukushima Prefecture, Japan
Manabu Kume, Toshihiro Wada, Junichi Takagi, Tomoya Hori, Hiromichi Mitamura,
Nobuaki Arai and Yoh Yamashita

Records of Bearded flathead goby Glossogobius bicirrhosus (Weber, 1894)(Teleostei: Gobiidae) from eastern Ishigaki-jima Island, Ryukyu Islands, Japan
Hirozumi Kobayashi and Yusuke Fuke

Original Papers
Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 95–105

Distribution and color variations of Carassius auratus in the Amami-Ryukyu Islands,
Japan
Yuichi Kano, Mikumi Takada-Endo, Tomomi Yamashita, Wataru Tanaka, Akihiko
Koyama and Kazuki Kanno
Abstract

The present-day distribution of Carassius auratus was surveyed in 1129

inland water bodies on mainland Kyushu, and the Osumi and Amami-Ryukyu Islands (5and 31 islands, respectively). The frequency of occurrence of the fish on the
Amami-Ryukyu Islands [30 of 516 locations on 10 islands (Amamioshima, Tokunoshima,
Iheya, Noho, Izena, Okinawa, Kume, Minamidaito, Miyako and Ishigaki Islands)] wassignificantly lower than on mainland Kyushu (65 of 241 locations). On the basis of oldrecords and a verbal survey of 266 local residents, it is likely that C. auratus has become
extinct on 10 islands (Kikai, Kakeroma, Uke, Okinoerabu, Yoron, Yagaji, Tokashiki,
Tarama, Iriomote, and Yonaguni Islands), there being no records of its occurrence at any
time on 11 additional small islands. Several specimens with unusual body colors, such asorange and blue (transparent-scale) types, were found, their likelihood of occurrence on
Amami-Ryukyu (19 individuals from 7 populations) being significantly greater than on
mainland Kyushu (1 individual from 1 population). Local Amami-Ryukyu residents also
recalled previous occurrences of silver (ordinary type), orange, blue (possiblytransparent-scale type), green (possibly transparent-scale type), white and black
individuals. It was concluded that Amami-Ryukyu Islands C. auratus, characterized byvarious body color patterns, is now endangered. The color variation could be aconservation symbol for C. auratus and the freshwater ecosystem of Amami-Ryukyu
Islands, if the native status of the species is verified.
(Corresponding author: Yuichi Kano, Institute of Decision Science for Sustainable

Society, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819–0395, Japan; e-mail:kano@species.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 107–112

First Japanese record of Acanthopagrus taiwanensis (Perciformes: Sparidae) from
Kagoshima Prefecture
Kyoji Fujiwara, Masahide Itou and Hiroyuki Motomura
Abstract

A single female specimen (256.4 mm standard length) of Acanthopagrus

taiwanensis Iwatsuki and Carpenter, 2006, collected off Kasasa, Minami-satsuma,
Kagoshima Prefecture, Japan, was characterized by the following combination ofcharacters: 3½ scale rows between fifth dorsal-fin spine base and lateral line; 3 or 4
oblique scale rows on cheek; modally 15 total gill rakers; 3 or 4 rows of flattened molars
on each side of upper and lower jaws; second anal-fin spine robust, bluntly pointed;
ventral edge of infraorbitals above maxilla nearly straight; anterior edge of dorsal scaly
area of head rounded; no black bars on head; a dark streak on each membrane of anal fin;and anal-fin soft rays whitish. The dorsal- head profile of the Japanese specimen was
relatively straight, compared with the convex profile in the type specimens of the species.
Other characters of the Japanese specimen, however, agreed well with those of A.
taiwanensis given in the original description. Acanthopagrus taiwanensis is very similar
to A. pacificus Iwatsuki, Kume and Yoshino, 2010, but can be distinguished from thelatter by having 3 or 4 oblique scale rows on the cheek (vs. 6 or 7 in the latter), modally
15 total gill rakers (vs. 17), flattened molar teeth on each side of the upper and lower jaws
(vs. rounded molariform teeth), a robust, relatively bluntly pointed second anal-fin spine(vs. acutely pointed), and whitish anal-fin soft rays (vs. blackish). Acanthopagrus
taiwanensis has been previously recorded only from Taiwan, the Kagoshima specimen
representing the first record from Japan and northernmost record for the species. The newstandard Japanese name “Iwatsukikurodai” is proposed for the species and distributional
implications of A. taiwanensis in Japanese waters discussed.
(Corresponding author: Kyoji Fujiwara, Graduate School of Fisheries, Kagoshima
University,

4–50–20

Shimoarata,

Kagoshima

890–0056,

Japan;

e-mail:kyojifujiwara627@yahoo.co.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 113–119

Interacting effects of lure color and turbidity on foraging response by rainbow trout(Oncorhynchus mykiss)
Kouki Nishidai and Atsushi Maruyama
Abstract

Increased turbidity is known to affect feeding of predatory fishes through its

effect on prey color, but interactions between turbidity and prey color are not well
documented. To determine the effects of turbidity, water temperature, and illuminance onlure color selected by rainbow trout (Oncorhynchus mykiss), investigations wereconducted in a fishing pond in Shiga Prefecture (Central Japan) for 11 days during July–
October, 2016. Five fishing series with different lures were conducted on each day, eight
differently colored lures being used in random order in each series (10-min trials×8colors). Generalized linear models, used to explain catch number variations per 10 min(0–6 individuals; Poisson distribution assumed), indicated that turbidity (1.0–13.6 NTU)
significantly influenced lure color selection by rainbow trout. Results indicated thatbrown lures (followed by dark green, black, and gold lures) were most preferred in low
turbidity, but least preferred when turbidity was high. In contrast, lures with a greaterreflection intensity [pink, orange, and karashi (mustard yellow)] were moderately
preferred, regardless of turbidity. Illuminance (1.2 × 102–2.9 × 105 lux) and watertemperature (15.2–25.5˚C) did not affect lure color selected by rainbow trout, but bothparameters negatively impacted the number of individuals captured per 10 min. The

findings highlighted the importance of environmental conditions (particularly turbidity)
on prey preference by predatory fishes.
(Corresponding author: Atsushi Maruyama, Faculty of Science and Technology,
Ryukoku

University,

Seta-Oe,

Otsu

City,

Shiga

520–2194,

Japan;

e-mail:maruyama@rins.ryukoku.ac.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 121–129

Records of the anthiine fish Plectranthias sheni from Japan and proposal of a new
standard Japanese name
Kyoji Fujiwara, Satokuni Tashiro, Mayumi Takayama, Hiroshi Senou and Hiroyuki
Motomura
Abstract

Ten specimens (87.8–126.5 mm standard length) of the anthiine fish

Plectranthias sheni Chen and Shao, 2002, previously known from Taiwan, were collected
off islands in Kagoshima Prefecture, southern Japan, the first reliable records of thespecies in Japanese waters. The species is characterized by the following combination ofcharacters: X, 17–18 dorsal-fin rays; 13 pectoral-fin rays, uppermost unbranched; 32–33
pored lateral-line scales; 4.5 scale rows above lateral line; 5 oblique scale rows on cheek;
17–18 gill rakers; third dorsal-fin spine longest; caudal fin emarginate; body reddish-pink
with upper and lower series of blotches on lateral surface, upper series of blotches (below
dorsal-fin base) barely extending below lateral line, posterior portion of lower series
usually forming a broad stripe. The new standard Japanese name ‘‘Kiobi-izuhanadai’’ isproposed for the species.
(Corresponding author: Kyoji Fujiwara, Graduate School of Fisheries, Kagoshima
University,

4–50–20

Shimoarata,kyojifujiwara627@yahoo.co.jp)

Kagoshima

890–0056,

Japan;

e-mail:Japanese Journal of Ichthyology
Vol. 64, No.2, pp. 131–138

Extent of genetic introgression in wild populations of minami-medaka in the
Nogawa River, Tokyo, Japan
Ryohei Nakao, Yuka Iguchi, Xiangying Zhou, Sakurako Kamide, Tadao Kitagawa and
Makito Kobayashi
Abstract

Genetic disturbance in Japanese wild medaka populations (Oryzias latipes

species complex) has resulted mainly from artificial introductions from geographicallydistinct populations or of commercial varieties, especially an orange-red body color
variety (himedaka). Because the extent of genetic introgression within a single water
body has remained unclear, the genetic population structure of wild minami-medaka
Oryzias latipes in the Nogawa River, a tributary of the Tamagawa River system in Tokyo,
Japan, was surveyed using three DNA markers (cytb and ND2 genes on mitochondrial
DNA and b-marker on nuclear DNA) to evaluate the extent of introgression throughout
upper and lower reaches. Genotypes originating from himedaka were detected at all sites
surveyed. Although different genetic composition of introgressed mitotypes among somesampling sites suggested multiple introductions of non-native populations, high dispersal
rates of introgressed genes could not be rejected as a cause of wide-spread introgression.
Based on this study, appropriate management strategies for the genetic conservation ofwild medaka populations are discussed.
(Corresponding author: Tadao Kitagawa, Graduate School of Agriculture, Kindai
University,

3327–204

Nakamachi,Nara

631–8505,

Japan;

e-mail:tkitagaw@nara.kindai.ac.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 139–143

First specimen-based record of the haemulid fish Diagramma melanacrum(Actinopterygii: Perciformes) from JapanTaiga Naito, Takeshi Yamakawa and Hiromitsu Endo
Abstract A single specimen [226 mm in standard length (SL)] of a haemulid fish
collected from Iriomote-jima Island, Okinawa Prefecture, Japan, in 2012, was identified
as Diagramma melanacrum Johnson and Randall, 2001, characterized by the following
combination of characters: third dorsal-fin spine longest; first dorsal-fin spine length
45 % of second dorsal-fin spine length; pelvic-fin length 23.9 % SL; 57 lateral-line
scales; and dorsal 3/4 of caudal fin yellow with many dark spots, and pelvic, anal andremainder of caudal fin black when fresh. The species has been recorded previously fromthe Philippines, Malaysia, Indonesia (Kalimantan and Bali to West Papua), the Timor Sea
and Japan (Miyako-jima and Ishigaki-jima Islands, Okinawa). However, because both
Japanese records were based on photographs, the Iriomote-jima Island specimen
represents the first reliable, specimen-based record of D. melanacrum from Japan, an
extension of its known northernmost range. The new standard Japanese name
“Hireguro-korodai” is proposed for the species..
(Corresponding author: Taiga Naito, Laboratory of Marine Biology, Faculty of Scienceand Technology, Kochi University, 2–5–1 Akebono-cho, Kochi 780–8520, Japan; e-mail:tongue.tongue.cynoglossus9@gmail.com)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 145–156

Fish assemblage associated with a spring macroalgal bed off western Nishi-Sonogi
Peninsula, Nagasaki, Japan
Tatsuru Kadota, Setuo Kiyomoto, Masahiro Nakagawa, Kousuke Yatsuya and Taku
Yoshimura
Abstract

Spring macroalgal beds, characterized by the occurrence of subtropical

Sargassum species and short vegetation periods during spring, occur off western Kyushu

and on the Pacific side of Shikoku, Japan. However, the fish assemblages of such
macroalgal beds are poorly known. Fish censuses conducted by divers over a spring
macroalgal bed and adjacent comparatively barren ground off Misaki, western Kyushu,
from June 2014 to May 2015, noted luxuriant macroalgal stands from March to June in
the former, whereas macroalgae were sparse from March to May in the barren area. Fortyfish species (22 families) and 39 species (23 families) were recorded in the macroalgal
bed and barren area, respectively, with similar mean numbers of species and individuals.
In both areas, Halichoeres tenuispinis, Istigobius campbelli, Pseudolabrus sieboldi,
Stethojulis interrupta terina and Pomacentrus coelestis occurred abundantly in all months
surveyed. As the luxuriant macroalgal stands were seasonal, only fish species which
could inhabit both vegetated and unvegetated habitats could persist yearlong within thearea of the macroalgal bed. Two species, Apogon notatus and Chaenogobius gulosus,
were seasonal inhabitants of both areas, the density of A. notatus tending to be higher inthe macroalgal bed in June. C. gulosus occurred in the macroalgal bed and aroundsparsely distributed macroalgae in the barren area in March and April. Spring macroalgal
beds may be an important habitat for seasonal fish species residents.
(Corresponding author: Tatsuru Kadota, Seikai National Fisheries Research Institute,Japan Fisheries Research and Education Agency, Taira-machi, Nagasaki 851–2213;
e-mail: kadota74@affrc.go.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 157–170

First

recordsoftheelectricray

Tetronarce

formosa(Torpediniformes:

Torpedinidae) from Japan, with a revised species’ diagnosis and comparisons withcongeners
Ayumi Bandai, Mizuki Matsunuma and Hiroyuki Motomura
Abstract

Thirty-five museum-held specimens (238.2–940.0 mm total length, TL) of

the electric ray Tetronarce formosa (Haas and Ebert, 2006), collected from the Pacificcoast of Japan from Ibaraki to Kochi prefectures, and the East China Sea, represent thefirst records of T. formosa from Japanese waters and include the northernmost record(Ibaraki) for the species (previously recorded only from Taiwan). The specimens aredescribed in detail and the validity of the following characters previously used to separate
T. formosa from the closely related species T. tokionis (Tanaka, 1908), confirmed: dorsal
surface of body purplish-brown in T. formosa (vs. dark chocolate-brown in T. tokionis),
disc oval (vs. essentially circular), disc width 63.6–67.9% of TL (vs. 50.1–52.6 %),posterior margin of caudal fin not emarginated (vs. emarginated), and distance fromposterior tip of pelvic fin to origin of lower caudal fin lobe less than three-quarters of
caudal fin height and less than half pelvic fin width (vs. more than three-quarters of
caudal fin height, and more than half pelvic fin width). Although spiral valve turns werepreviously regarded as diagnostic, separating T. formosa from T. tokionis, that characteris not considered valid, following dissection. Further comparisons of Japanese T. formosawith T. tokionis based on 35 and 5 specimens, respectively, revealed the former to differ
from T. tokionis in the following additional characters: cloaca to pectoral fin margin
length 27.9–36.5% (mean 32.9%) of TL [vs. 25.1–30.8% (27.5%) in T. tokionis]; caudal
fin overall height 19.3–25.6% (22.4%) [vs. 14.2–18.9% (17.0%)]; caudal fin height at
dorsal lobe 7.2–11.0% (9.5%) [vs. 5.9–6.7% (6.4%)] in males; snout to maximum discwidth 28.1–38.8% (32.0%) [vs. 26.5–27.2% (26.9%)] in females; pelvic fin width 26.1–
33.1% (30.0%) [vs. 18.5–18.8% (18.7%)] in females; and caudal fin height at ventral lobe
9.3–12.1% (10.7%) [vs. 5.8–7.6% (6.7%)] in females.
(Corresponding author: Hiroyuki Motomura, The Kagoshima University Museum, 1–
21–30

Korimoto,

Kagoshima

motomura@kaum.kagoshima-u.ac.jp)

890–0065,

Japan;

e-mail:Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 171–174

First Japanese record of Conocara fiolenti (Alepocephalidae) collected from
Hyuga-nada, Japan
Munehiro Takami, Hiromitsu Endo and Atsushi Fukui
Abstract

The family Alepocephalidae, comprising about 18 genera and at least 95

species of benthic and pelagic deep-sea fishes, includes 10 species of the genus Conocara,
known from about 800 to more than 5000 m depth in the Indo-Pacific and Atlantic
Oceans. Conocara is characterized by the dorsal-fin origin located posterior to theanal-fin origin, the dorsal-fin base shorter than the anal-fin base, the body covered withsmall scales (>80 in longitudinal row above lateral line), tubular lateral line scales,maxilla toothless, upper jaw equal to or longer than snout and photophores absent. A
single specimen of Conocara fiolenti Sazonov and Ivanov, 1979, collected from
Hyuga-nada, Japan in a depth of 1453–1481 m, on 3 April 1991, is distinguished from allcongeners by the following combination of characters: dorsal-fin rays 22, anal-fin rays 28,
gill rakers absent on upper limb, number of scales in longitudinal series above lateral line
ca. 220, length of anal-fin base 22.7% SL, predorsal-fin length 68.2% SL, head length
29.2% SL, orbital diameter 6.6% SL, anterior margin of premaxilla lacking a bony ridgeand posterior margin of maxilla extending beyond anterior margin of eye. Conocara
fiolenti has been previously recorded from tropical and temperate zones of the Indian,western Pacific and Atlantic Oceans. However, the present specimen represents the firstrecord from Japanese waters and northernmost record in the Pacific Ocean. The newJapanese name “Maru-kuchi-yajiri-iwashi” is proposed for the species.
(Corresponding author: Munehiro Takami, School of Marine Science and Technology,
Tokai

University,

Orido,

mune-takami@hotmail.co.jp)

Shimizu,

Shizuoka

424–8610,

Japan;

e-mail:Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 175–178

First Japanese record of Paraheminodus kamoharai (Peristediidae) from Kochi,
Japan
Toshio Kawai
Abstract Armored searobins in the Indo-West Pacific genus Paraheminodus Kamohara,
1958 (Peristediidae), characterized by upper jaw teeth, the lateral head margin smooth,posterior pairs of lower lateral row bony plates separated from each other, andunbranched barbels on the lower jaw (except for posteriormost lip and chin barbels),
include four species: Paraheminodus laticephalus (Kamohara, 1952), P. murrayi(Günther, 1880), P. kamoharai Kawai, Imamura and Nakaya, 2004 (known only from asingle record from the Sulu Sea, Philippines) and P. longirostralis Kawai, Nakaya and
Séret, 2008. To date, only P. laticephalus and P. murrayi have been recorded from Japan.
However, a single specimen of P. kamoharai (114.2 mm in standard length) collectedfrom Kochi, Japan, was found in the collection of Kyoto University, Japan, being thesecond record of the species and first from Japanese waters. Paraheminodus kamoharai is
re-diagnosed, having 5+1+17–20=23–26 gill rakers, rostral projection length 42.5–47.0%
of head length, upper jaw length 40.5–42.3% of head length, lower jaw length 36.5–
37.7% of head length, pectoral fin length 57.5–66.4% of head length, preopercular spine
length 34.9–40.9% of head length, distance from anus to caudal fin 46.9–49.3% of
standard length, and both forwardly and backwardly directed spines on the posterior
upper lateral row bony plates. The new Japanese standard name “Kamohara-kihoubou” isproposed for the species.
(Corresponding author: Fisheries Science Center, Hokkaido University Museum,
Minato-cho,

Hakodate,kawai@museum.hokudai.ac.jp)

Hokkaido

041–8611,

Japan;

e-mail:Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 179–184

First record of the liparid fish Careproctus zachirus from Japan
Koji Matsuzaki, Harutaka Taira, Toshiaki Mori, Takahiro Nobetsu and Kaoru Kido
Abstract The genus Careproctus Krøyer, 1862, including more than 50 species fromthe North Pacific, is characterized by a single pair of nostrils, pelvic disk present, fewer
pectoral fin rays than anal fin rays, pseudobranchia absent and non-variegated body color(except for fins). Seven specimens [AMF (Marine Science Museum, Aquamarine
Fukushima) -2-11-04-00-0025–0031, 232–288 mm in standard length] collected in 2007,2015 and 2016 in commercial shrimp traps and gill nets off Rausu-cho, southwestern Sea
of Okhotsk, Japan, at depths of 200–800 m, were confirmed as the blacktip snailfish
Careproctus zachirus Kido, 1985, having 28–31 pectoral fin rays, 10–11 caudal fin rays
fin rays, 1 suprabranchial pore, a long upper pectoral fin lobe (over 40 % of SL), theposterior part of the upper pectoral fin lobe pigmented with black on both outer and innersides, and black submarginal bands on the dorsal and anal fins joining in the middle ofthe caudal fin. Although the species has been previously collected in Pacific waters off
the northern Kuril Islands and eastern Kamchatka, and in the Bering Sea off the AleutianIslands, the present specimens represent the first record from Japanese waters. In addition,observations on feeding behavior and reproductive ecology of the species are reported forthe first time.
(Corresponding author: Marine Science Museum, Aquamarine Fukushima, 50 Tatsumi–cho, Onahama, Iwaki, Fukushima 971–8101, Japan; e-mail: matsu@aquamarine.or.jp)

Notes
Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 185–189

First records of Plectranthias xanthomaculatus (Serranidae: Anthiinae) from

Okinawa and Kochi prefectures, southern Japan, with notes on ontogenetic
morphological changes
Mizuki Matsunuma, Makoto Okamoto, Takeshi Yamakawa and Hiromitsu Endo
Abstract

Nineteen specimens of Plectranthias xanthomaculatus (Serranidae),previously known only from Taiwan (type locality) and the East China Sea off Amami
Islands, Kagoshima Prefecture, Japan, are recorded from Tosa Bay, Kochi Prefecture andoff Tonaki-jima Island, Okinawa Prefecture, Japan. The Japanese specimens [19.4–43.3mm standard length (SL)] differed from the two previously known specimens (50.2–57.6mm SL) in having 0–8, 0–3 and 0 or 1 weakly developed serrae on the posterior marginsof the preopercle, interopercle and subopercle, respectively (vs. serrations absent in thelatter). The absence of such serrations in the larger specimens, the species having been
diagnosed by a smooth preopercle, interopercle and subopercle margins in previous
studies, is indicative of an ontogenetic change. The smaller Japanese specimens (less than
34 mm SL) differed from larger examples in having somewhat pinkish pelvic, anal andcaudal fins (vs. yellow fins in the latter) and numerous melanophores within yellow
markings on the head and body (vs. melanophores absent).
(Corresponding author: Mizuki Matsunuma, Laboratory of Marine Biology, Faculty of
Science and Technology, Kochi University, 2–5–1 Akebono, Kochi 780–8520, Japan;
e-mail: k1139853@kadai.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 191–193

A second record of Mola sp. A (Ushi-manbo), from the Sea of Japan and first record
from Toyama Prefecture, Japan
Etsuro Sawai, Yusuke Yamanoue, Tomoharu Kimura and Osamu Inamura
Abstract

A specimen of Mola sp. A (Ushi-manbo sensu Yamanoue et al., 2010),

captured by set net off Uozu, Toyama Prefecture (36˚48'N, 137˚22'E), Japan on 16th

January 2017, represents the second record of the species from the Sea of Japan and firstrecord from Toyama Prefecture. Several examples of the caligid parasite Lepeophtheirussp. (Crustacea: Copepoda) were found on the head of the specimen. Sea surface
temperature (SST) on the collection day was 13–14 ˚C, SSTs associated with theoccurrence of Mola sp. A specimens in the Sea of Japan being lower than those in the
Pacific.
(Corresponding author: Etsuro Sawai, National Research Institute of Far Seas
Fisheries, Japan Fisheries Research and Education Agency, 5–7–1 Orido, Shimizu-ku,
Shizuoka, Shizuoka 424–8633, Japan; e-mail: sawaetsu2000@yahoo.co.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 195–199

Second Japanese record of Plectranthias wheeleri (Perciformes: Serranidae) from
Suwanose-jima island, Tokara Islands, Kagoshima Prefecture, southern Japan
Satokuni Tashiro, Mayumi Takayama and Hiroyuki Motomura
Abstract

A single specimen (65.1 mm standard length) of Plectranthias wheeleri

Randall, 1980 (Serranidae) collected off Suwanose-jima island, Tokara Islands,
Kagoshima Prefecture, Japan (previously known from a single specimen from
Yoron-jima island, Amami Islands) represents both the second record from Japanesewaters and northernmost record of the species.
(Corresponding author: Satokuni Tashiro, The United Graduate School of Agricultural
Sciences, Kagoshima University, 1–21–24 Korimoto, Kagoshima 890–0065, Japan;
e-mail: k0587888@kadai.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 201–205

First record of juvenile spotted scat Scatophagus argus from the Matsukawa-ura

lagoon, Fukushima Prefecture, Japan
Manabu Kume, Toshihiro Wada, Junichi Takagi, Tomoya Hori, Hiromichi Mitamura,
Nobuaki Arai and Yoh Yamashita
Abstract

Four juvenile spotted scat Scatophagus argus (30.3–34.6 mm standard

length), collected on 28th October 2016 from the Matsukawa-ura lagoon, Fukushima
Prefecture, Japan, represent the first record of S. argus in Fukushima Prefecture and thenorthernmost record along the Pacific coast of Japan. Because spotted scat cannot survive
below 11.0˚C, the lower winter water temperatures in the lagoon would prevent
year-round survival. Accordingly, the specimens are thought to represent abortive
migration, likely having been transported to the lagoon by the Kuroshio Current.
(Corresponding author: Manabu Kume, Field Science Education and Research Center,
Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, Kyoto, 606–8502 Japan; e-mail:kume.manabu.6x@kyoto-u.ac.jp)

Japanese Journal of Ichthyology
Vol. 64, No. 2, pp. 207–211

Records of Bearded flathead goby Glossogobius bicirrhosus (Weber, 1894)(Teleostei: Gobiidae) from eastern Ishigaki-jima Island, Ryukyu Islands, Japan
Hirozumi Kobayashi and Yusuke Fuke
Abstract

Examples of Bearded flathead goby, Glossogobius bicirrhosus (Weber, 1894),

collected from the sand/gravel bottom of a river draining part of eastern Ishigaki-jimaIsland, Ryukyu Islands, Japan in 2013 and 2017. It represent the first discovery of thespecies from the eastern area of the island and first specimen-based records from theisland over the past 12 years.
(Corresponding author: Hirozumi Kobayashi, Graduate School of Engineering andScience, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903–0213, Japan;
e-mail: hrzm.kobayashi5884@gmail.com)