KOREAN JOURNAL OF ICHTHYOLOGY, Vol. 32, No. 4, 251-256, December 2020
ISSN: 1225-8598 (Print), 2288-3371 (Online). DOI: https://doi.org/10.35399/ISK.32.4.7

Received: September 28, 2020
Revised: November 10, 2020
Accepted: December 18, 2020

First Record of a Goby, Callogobius shunkan (Perciformes: Gobiidae)
from the Southern Coastal Waters of Jejudo Island, Korea
By Jung-Hyun An1,2, Byung-Jik Kim2,* and Sang-Kil Kim3
1Division of Life Sciences, College of Life Sciences, Incheon National University, Incheon 22012, Republic of Korea

2Biological Resources Research Department, National Institute of Biological Resources, Incheon 22689, Republic of Korea
3PADI 5 Star IDC Center, Good Diver, Jeju 63558, Republic of Korea

We described the first record of Callogobius shunkan from Korea, based on two
ABSTRACT
specimens (54.9~66.1 mm in standard length) collected from the southern coastal waters of Jejudo
Island. These specimens were characterized by prominent papillae ridges on the head, including
postnasal and postorbital rows, well-developed pelvic frenum, dark brownish head, scattered whitish
flecks on the body, and three blackish spots on the basal portion of dorsal fins. We proposed a new
Korean name, “Ju-reum-mang-dug” for the species.
Key words: Callogobius shunkan, goby, Ju-reum-mang-dug, Jejudo Island

INTRODUCTION
During a survey for the exploration of coastal fishes in
Korea with SCUBA gear, we encountered an interesting
bottom-dwelling goby at a depth of about 15 m in thesouthern coastal waters of Jejudo Island, Korea, in June
2015. The goby was smaller than 10 cm in length withthree blackish saddles on a dark brownish body when alive
and was found amongst rubble and on sandy substrates ofa relatively steep reef slope. In late September of the same
year, two specimens were collected for the first time by a
combination of hand net and homemade angling at similar
depths from the same locality.
These specimens had well-developed cutaneous sensory papillae on the head and were easily identified as amember of the goby genus Callogobius Bleeker, 1874,
comprising about currently 25 valid species worldwide
among 49 nominal species (Eschmeyer and Fricke, 2016).
Of these, the following 10 species have been known fromthe northwestern Pacific: C. hasseltii (Bleeker, 1851); C.
sclateri (Steindachner, 1879); C. okinawae (Snyder, 1908);저자 직위: 안정현 (전문위원), 김병직 (환경연구관), 김상길 (대표)*Corresponding author: Byung-Jik Kim Tel: 82-32-590-7475,
Fax: 82-32-590-7250, E-mail: kimbyungjik@gmail.com

C. tanegasimae (Snyder, 1908); C. maculipinnis (Fowler,
1918); C. shunkan Takagi, 1957; C. flavobrunneus (Smith,1958); C. hastatus McKinney and Lachner, 1978; C. crassus McKinney and Lachner, 1984; Callogobius sp. (sensu
Akihito et al., 2013). Although no individuals have been
known from the Korean waters until now, we identified thespecimens as Callogobius shunkan Takagi, based on morphological accordance with the original description of thespecies. The species has been known from the Western Pacific, including the east coast of northern Australia, Indo­nesia, and north to Japan. In the present study, we therefore
describe C. shunkan as the first record from Korean waters
based on two specimens (54.9~66.1 mm standard length,SL) collected from the southern waters of Jejudo Island.
Counts and measurements generally followed those of
Hubbs and Lagler (1964), and the numbering system of
sensory papillae rows was those of Akihito and Meguro(1977) and Delventhal and Mooi (2013). The numbersof vertical fin rays and vertebrae were determined using
radiographs (Softex CMB-2, Japan). The dorsal fin pterygiophore formula (P-V) followed those of Akihito (1984)
in describing the pattern of the interdigitation of the dorsal fin pterygiophores between the neural spines. Voucher
specimens are deposited in the fish collection at the Natio­
nal Institute of Biological Resources (NIBR-P), Kor­ea.

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http://www.fishkorea.or.kr

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Jung-Hyun An, Byung-Jik Kim and Sang-Kil Kim

TAXONOMIC ACCOUNTS

A

Genus Callogobius Bleeker, 1874
(New Korean name: Ju-reum-mang-dug-sog)
Callogobius Bleeker, 1874: 318 (type species: Eleotris hasseltii Bleeker).
Head compressed at preopercular portion; interorbital
regi­on narrower than eye diameter; both nostrils tubular
and anterior one longer, reaching upper margin of upper lip
when depressed; lower jaw more projected than upper jaw,
posterior tip of maxilla not beyond anterior margin of eye;lower margin of gill opening beyond posteriorly anterior
margin of pelvic girdle; teeth on both jaw unicuspidal. Pitorgans on head a single row, pits opening on dermal fold,
and teeth on outer row large (Akihito and Meguro, 1977).

B

Callogobius shunkan Takagi, 1957
(New Korean name: Ju-reum-mang-dug)(Figs. 1~2; Table 1)
Callogobius shunkan Takagi, 1957: 112, pl. 5, fig. d (typelocality: Matsugaura Chiran, Kagoshima Prefecture, Jap­an); Motomura et al., 2015: 29 (Uji Island, Japan).
Callogobius snelliusi: Akihito and Meguro, 1977: 119 (Jap­an); Akihito et al., 2002: 1169 (Japan).
Material examined. Two specimens: NIBR-P0000041563,
66.1 mm in standard length (SL), NIBR-P0000041564,
54.9 mm in SL, collected off Beophwan-dong, Seogwiposi, Jeju-do, Korea, at 15.6~16.6 m depths, on 23 September 2015, by Byung-Jik Kim and Gang-Il Choi, SCUBA
gear, a hand net or homemade angling.
Diagnosis. A small goby species with prominent papillae
ridges on head, including postnasal and postorbital rows,
well-developed pelvic frenum, dark brownish head, scattered whitish flecks on body, and three blackish spots on
basal portion of dorsal fins when fresh.
Description. Dorsal fin rays VI-I, 10; anal fin rays I, 8;
pectoral fin rays 15~17, upper- and lowermost one or two
rays unbranched; pelvic fin rays, I, 5, forming sucking
disc, pelvic frenum well-developed; principal caudal fin
rays 17; gill rakers 3 + 9 = 12; vertebrae 26; P-V 3/II II I I
0/9; scales in longitudinal row 27~29; scales in transverserow 9~10; predorsal scales 8~9. Proportion of percentage
in SL: body depth at origin of pectoral fin 17.3~18.5 (mean
17.9); body depth at anal fin origin 17.3~17.7 (17.5); bodywidth 18.4~18.6 (18.5); head length 30.7~31.5 (31.1);
head width 23.3~23.5 (23.4); eye diameter 6.5~6.6 (6.5);
interorbital width 2.7~3.3 (3.0) at bony part; snout length

Fig. 1. Two fresh specimens (A: above, NIBR-P0000041563, 66.1 mm
SL, male; below, NIBR-P0000041564, 54.9 mm SL, female) and underwater photograph (B: Seopseom Island, Jeju-do, Korea, 26 Septem-­ber, 2019) of Callogobius shunkan, from the southern coastal waters ofJeju­do Island, Korea.

10.3~10.7 (10.5); cheek depth 6.7~7.1 (6.9); upper jaw
length 9.7~9.8 (9.8); postorbital length 14.7~15.5 (15.1);
snout to origin of first dorsal fin 36.2~36.8 (36.5); snout
to origin of second dorsal fin 54.8~55.4 (55.1); snout toorigin of pectoral fin 29.5~29.7 (29.6); snout to originof pelvic fin 29.0~29.7 (29.4); snout to origin of anal fin
59.8~62.1 (60.9); base of dorsal fins 43.0~46.4 (44.7);
length of first dorsal fin 16.8~24.2 (20.5); length of second dorsal fin 17.1~21.7 (19.4); length of third dorsal
spine 16.2~16.6 (16.4); length of second dorsal fin spine
12.6~13.2 (12.9); length of longest soft dorsal ray (penultimate ray) 18.6~21.0 (19.8); length of anal fin spine
6.6~7.1 (6.8); length of longest anal soft ray (penultimateray) 20.4~22.8 (21.6); length of pectoral fin 25.9~27.7(26.8); length of pelvic fin 21.7~24.7 (23.2); length ofpelvic spine 6.1~6.2 (6.1); length of caudal fin 26.6~26.9(26.8); depth of caudal peduncle 13.3~13.5 (13.4); length

First Record of Callogobius shunkan from Korea

of caudal peduncle 22.6~24.4 (23.5).
Body elongate, cylindrical anteriorly, and slightly compressed posteriorly with rather slender caudal peduncle.
Head moderate and somewhat depressed anteriorly; papillae ridges well-developed. Mouth small and oblique, lower
jaw slightly longer than upper jaw, its posterior tip reaches
a vertical at posterior nostril; small conical teeth on upperand lower jaws, in three to four and five to six irregularrows, respectively, outer row enlarged; vomer and palatines
without teeth; nostrils tubular, anterior nostril longer thanposterior one. Eye rather large, situated dorsally and inter­orbital space very narrow. Tongue emarginated with ashallow groove at its tip and fused with mouth floor with athin membrane. Gill opening not wide and gills fused withisthmus. Dorsal fins two and nearly connected to each otherby a minute membrane; second dorsal fin slightly lower
than first dorsal fin and of nearly equal height as anal fin.
First and second spinous rays of first dorsal fin longer thanthose of other rays. Second dorsal fin and anal fin opposite
and similar in shape as each other. Pectoral fin rather large,
all rays branched, and its posterior margin reaches a verticalat second dorsal fin origin. Pelvic fin rather large and pelvic
frenum well-developed. Caudal fin round and fan-like.
Body with large ctenoid scales except anterior portionof head. Predorsal region and upper part of opercle withcycloid scales. Snout, ventral sides of head, and gill membrane naked.
Cephalic sensory canal pores (Fig. 2): B’, C (single), D(single), E, F, G, and H’ on preoculoscapular canal; K’and
L’ on postoculoscapular canal; M’, N, and O’ on preopercular canal.
Papillae row configuration (Fig. 2): internasal row (Row1) short; postnasal row rather long and between posterior
nostrils (2); interorbital row (3) on anteromedial region
between orbitals; oblique premaxillary row (4) very short;preorbital row (5) below nostrils; upper longitudinal premaxillary row (6) rather short; lower longitudinal premaxillary row (7); transverse maxillary (8), anterior suborbital (9),and mid suborbtial (10) rows on anterior portion of cheek;
posterior suborbital row (11); longitudinal cheek row (12);transverse cheek row (13); longitudinal maxillary row (14)long beyond transverse cheek row posteriorly; longitudinal
mandibular row (15) very long along mandible; transverse
mandibular rows (16) three and short; postorbital row (17);upper cranial row (18); lower cranial row (19) on dorsola­terally; preopercular row (20) restricted on upper region ofpreopercle; transverse opercular row (21) long along anterior region of opercle; oblique opercular row (22); subopercular row (23) rather short; intermandibular (24) on medial
region of lower jaw.

253

Fig. 2. Dorsal (above), lateral (middle), and ventral (below) aspects ofhead region in Callogobius shunkan (NIBR-P0000041563, 66.1 mmSL) showing the cephalic sensory canal and papillae. Bar indicates
10 mm.

Color when fresh. Head and body uniformly dark brownwith whitish flecks. First dorsal fin yellowish brown withfive pale pinkish oblique stripes and second dorsal fin darkbrown with three to four rows of pale pinkish dots. Basesof first and second dorsal fins with single and double dots,
respectively. Pectoral fin dark brown with irregular whitish
stripes and its distal margin whitish. Pelvic and anal finsuniformly blackish with white distal margin. Caudal fin
dark with irregular whitish speckles.
Color after preservation. Nearly same as when fresh,

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Jung-Hyun An, Byung-Jik Kim and Sang-Kil Kim

Table 1. Comparison of diagnostic characters of Callogobius shunkan between the present study and previous works

Standard length (mm)Dorsal fin rays
Anal fin rays
Pectoral fin raysLongitudinal scales
Transverse scales
Predorsal scales
Gill rakers
Cutaneous ridges of sensory papillae on head
Dark vertical bars below dorsal fins
Tip of tongue
Pelvic frenum% in SL
Head length% in head length
Eye diameter% in eye diamter
Interorbital width

Korean specimens

Takagi (1957)

54.9~66.1 (n = 2)
VI-I, 10
I, 8
15~17
27~29
9~10
9
3+9
well-developed
threeemarginate
present

49.0~59.0 (n = 2)
VI-I, 10
I, 8
17
31~33
8
3 + 91well-developed
emarginate
present

31.0~58.0 (n = 12)
VI-I, 8~10
I, 7~8
17~19
26~34
8~11
6~11
0 + 81well-developed
threeemarginate
present

30.7~31.5 (mean 31.1)

29.1~31.4 (30.2)

30.7~33.9 (31.8)

20.8~21.1 (20.9)

19.7~20.7 (20.2)

18.6~27.4 (20.9)

41.8~50.0 (45.9)

37.5~50.0 (43.7)

30.8~52.6 (43.5)

Akihito and Meguro (1977)

Superscription means the number of specimen examined.

except lighter brown on head and body, and yellow andpink color disappeared from body.
Distribution. Known from Hong Kong, Japan (Akihito
and Meguro, 1977; Akihito et al., 2013), and Korea (present
study).
Remarks. The specimens collected from the southerncoastal waters of Jejudo Island, Korea, were readily assig­
ned as a member of the genus Callogobius Bleeker, basedon well-developed cutaneous ridges of sensory papillae on
the head (Akihito and Meguro, 1977). Among the 10 valid
Callogobius species known from the northwestern Pacific,
including Callogobius sp. (sensu Akihito et al., 2013), thepresent specimens were in good agreement with C. shunkan
Takagi, 1957. The specimens had prominent papillae ridges
on the head including postnasal and postorbital rows,
well-developed pelvic frenum, dark brownish head andbody with scattered whitish flecks, and three blackish spots
on the basal portion of dorsal fins, as well as major morphometric characters, as shown in Table 1. There was aslight difference in the total number of gill rakers between
the present study and Akihito and Meguro (1977). However,
it is likely that they missed some small rakers on the upper
limb of the gill arch due to their minute size. Although
Takagi (1964) treated C. shunkan as a junior synonym of
C. snelliusi Koumans, 1953 without any taxonomical consideration, and Akihito and Meguro (1977) subsequently

followed Takagi’s treatment of the species (Akihito et al.,2013), Takagi (1957) clearly noted that C. shunkan differsfrom the similar species C. snelliusi Koumans, 1953 in 10
dorsal and 8 anal soft rays, lower body height, smaller eye,longer snout, and emarginated tongue at the tip. In addition,
Akihito et al. (2013: 2125) suggested C. shunkan as a valid
species distinguishable from C. snelliusi by the head characteristics, as well as the distribution pattern of scales on theventral side of the head. The Korean specimens have manysmall scales on their head, and their anterior limit on theventral head region is below the preopercle, as mentioned
by Akihito et al. (2013). The new Korean name, “Ju-reummang-dug”, refers to having dermal folds for sensory
papillae on the head.

ACKNOWLEDGEMENTS
We express our thanks to Mr. Gang-Il Choi (Good Diver,Jeju, Korea) for his support in collecting the specimens
during fieldwork. We would like to thank Editage (www.
editage.co.kr) for English language editing. This work was
supported by a grant from the National Institute of Biolo­
gical Resources, funded by the Ministry of Environmentof the Republic of Korea (NIBR No. 201501117).

First Record of Callogobius shunkan from Korea

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236-238.
Akihito, P. and K. Meguro. 1977. Five species of the genus Callogobius found in Japan and their relationships. Japan. J.
Ichthyol., 24: 113-117.
Akihito, P., K. Sakamoto, Y. Ikeda and K. Sugiyama. 2002. Gobioidei. In: Nakabo, T. (ed.), Fishes of Japan with pictorial keys
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new species of goby (Teleostei: Gobiidae) from the western
Indian Ocean. Zootaxa, 3630: 155-164.
Eschmeyer, W.N. and R. Fricke. 2016. Eschmeyer’s catalog of fishes:
genera, species, references. Available at: http://reserch­arch­ive.
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Islands. Proc. Acad. Nat. Sci. Philadelphia, 70: 2-71.
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fish from the Indo-Pacific region (Teleostei: Gobiidae). Proc.
Biol. Soc. Wash., 97: 627-631.
Motomura, H., A. Habano, Y. Arita, M. Matsuoka, K. Furuta, K.
Koeda, T. Yoshida, Y. Hibino, B. Jeong, S. Tashiro, H. Hata,
Y. Fukui, K. Eguchi, T. Inaba, T. Uejo, A. Yoshiura, Y. Ando,
Y. Haraguchi, H. Senou and K. Kuriiwa. 2015. The Ichthyofauna of the Uji Islands, East China Sea: 148 new records offishes with notes on biogeographical implications. Mem. Fac.
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Jung-Hyun An, Byung-Jik Kim and Sang-Kil Kim제주도 남부 연안 해역에서 채집된 농어목 망둑어과한국첫기록종 , Callogobius shunkan
안정현 1,2 · 김병직 2 · 김상길 31인천대학교대학원 생물학과, 2국립생물자원관 생물자원연구부, 3제주굿다이버

요 약 : 우리나라 연안성 어류자원 미발굴 분류군 탐색을 위해 제주도 남부 연안해역에서 SCUBA를 이용한 수중조사 과정 중 2015년 9월 수심 약 15미터에서 망둑어과 한국첫기록종인 Callogobius shunkan 2개체 (표준 체장
54.9~66.1 mm)를 채집하였다. 본 종은 살아있을 때 암갈색 바탕에 등지느러미 기저부에서 시작하는 3개의 흑갈색안상반문이 있는 점, 두부 감각관과 잘 발달된 피습에 공기열이 배열되어 있는 점 (특히 비공과 안와 후방에 공기열이 있는 점), 배지느러미막이 잘 발달된 점, 흑갈색 바탕의 체색에 백색 반점이 산재하는 특징이 있다. 본 종의 신한국명으로 ‘주름망둑’을 제안한다.
찾아보기 낱말 : Callogobius shunkan, 망둑어류, 주름망둑, 제주도