いためつ

[ヨナッペ @hitogatamushi]

論文が出版されました。
同名関係にあるヒトガタムシ科カイアシ類の学名に対して新置換名を命名しました。

[いためつ @Itametsu]

今年前半はかなり色々見たな

[やままゆ @yamamayufish]

久々に投稿。
某所のアサガラハゼを今年も生息確認してきました。最後にこの場所で見たのが去年の10月くらいで極小サイズでしたが今回採れた個体は30~40mmくらい。
…再生産してそう。

[Fish in the News @FishInTheNews]

#NewSpeciesAlert - 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎, a new species of goby (Gobiidae) is described from specimens collected from the Strait of Malacca near Penang Island, Malaysia.

🔒 https://t.co/jThCPjGIOZ

"𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 was recorded at three localities situated less than 500 m from large-scale sea reclamation projects on Penang Island. These sites have been, and continue to be, under considerable anthropogenic disturbance. ..... Therefore, this study highlights the essential need for the evaluation of 𝐴. 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 to determine its potential vulnerability to ongoing coastal developments."

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎, a new gobiid species (Teleostei: Gobiidae) from the Strait of Malacca

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Tan, Y. Y., Lavoué, S., & Khaironizam, M. Z. (2026). 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎, a new gobiid species (Teleostei: Gobiidae) from the Strait of Malacca. Journal of Fish Biology, 1–10. https://t.co/e6gf1vG7Nn

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 sp. nov. (Teleostei: Gobiidae) is described based on 21 specimens (32.3–70.2 mm SL) collected from the Strait of Malacca near Penang Island, Malaysia. 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 is described by the following combination of characters: second dorsal fin I,10; anal fin I,9; pectoral fin rays 17–18; segmented caudal fin 16, in 9/7 pattern; lateral scales 28–30; transverse scale counts backward (TRB) usually 9–10; predorsal scales 0–6; cheek and opercle naked; 3–5 irregular rows of rounded bluish spots on lateral side above midline, less aligned in females and juveniles. 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 is mostly similar to its sympatric congener 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑦𝑎𝑛𝑜𝑚𝑜𝑠 (Bleeker 1849). However, 𝐴. 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 can be distinguished from the latter by six or less predorsal scales (versus 10 or more), 3–5 irregular rows of iridescent bluish spots along side (versus 6–8 longitudinal rows of spots), spots never overlapped with brown blotches along midline (versus occasionally overlapped). The minimum cytochrome oxidase subunit I-based genetic distance between the two species is 11.8%.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The specific epithet 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 derives from the Latin 𝑐𝑎𝑒𝑟𝑢𝑙𝑒𝑢𝑠 (blue) and 𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑢𝑠 (starred). It refers to the conspicuous pattern of scattering vivid bluish spots restricted to the dorsal half of the body. The name 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 is treated as a noun in the genitive.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Live colouration of 𝐴𝑢𝑙𝑜𝑝𝑎𝑟𝑒𝑖𝑎 𝑐𝑎𝑒𝑟𝑢𝑙𝑜𝑠𝑡𝑒𝑙𝑙𝑎𝑡𝑎 sp. nov. (a) ZRC 69027, holotype, male, 70.2 mm SL (b) ZRC 69028, paratype, male, 67.6 mm SL (c) ZRC 69028, paratype, female, 52.8 mm SL. Scale bar = 1 cm.

© 2026 the Author(s). Published in the Journal of Fish Biology.

#NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #TeamGoby #Reef #CoralReef #ReefTank #FishTank #SaltwaterTank #ReefBuilders #MarineAquarium #MarineTank #ReefAquarium #Aulopareia #Gobiidae #Malaysia #StraitOfMalacca #Goby #PenangIsland

[いためつ @Itametsu]

きてる

[Fish in the News @FishInTheNews]

#NewSpeciesAlert - 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑔𝑜𝑛𝑖, a new species of teardrop goby (Oxudercidae: Gobionellinae) is described from east Africa. Populations from the east African coast have traditionally been assigned to 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖; here, the authors describe the east African lineage as the aforementioned new species.

"We further discuss the need for genus revision, considering that species diversity within 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 may be overestimated, with several nominal taxa likely representing conspecific populations of 𝑂. 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖𝑠 sensu stricto."

🔓 https://t.co/L3bAwPm8TJ

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Systematic revision of east African 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 (Oxudercidae: Gobionellinae) reveals a distinct species, 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑔𝑜𝑛𝑖 sp. nov., formerly assigned to 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖 (Valenciennes, 1837)

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Zarei, F., Bills, R., Motomura, H., Kovačić, M., & Chakona, A. (2026). Systematic revision of east African 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 (Oxudercidae: Gobionellinae) reveals a distinct species, 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑔𝑜𝑛𝑖 sp. nov., formerly assigned to 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖 (Valenciennes, 1837). Journal of Fish Biology, 1–19. https://t.co/2kimH2bVeL

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
Species of the gobionelline genus 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 Bleeker, 1874 (Oxudercidae) are small gobies inhabiting muddy estuaries, coastal bays and lagoons, with some extending into freshwater systems. All recognised species occur in the western Pacific and eastern Indian oceans, except 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖 (Valenciennes, 1837), previously considered widespread across the Indo-West Pacific to include the western Indian Ocean. Populations from the east African coast have traditionally been assigned to this species. Phylogeographic analysis of mitochondrial COI sequences reveals two deeply divergent lineages within 𝑂. 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖𝑠 sensu lato: one distributed from the Indian subcontinent to the western Pacific, and another restricted to east African estuaries from South Africa to Kenya. The lineages differ by 5% sequence divergence and show allopatric distributions, with no confirmed records between Kenya and western India. Males of the Indo-Pacific lineage possess small black spots on the head, jaw membranes and anterior dorsal body, which are absent in the east African lineage. Based on genetic divergence, distributional isolation and several sex-specific differences (most notably the male colour pattern), the east African lineage is described as a new species, 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 ����𝑜𝑛𝑖 sp. nov. We further discuss the need for genus revision, considering that species diversity within 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 may be overestimated, with several nominal taxa likely representing conspecific populations of 𝑂. 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖𝑠 sensu stricto.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The specific name 𝑔𝑜𝑛𝑖 honours Mr. Ofer Gon, Curator Emeritus of marine fishes at the NRF-SAIAB, in recognition of his contributions to the taxonomy, biology and curation of marine Indo-Pacific fishes. 𝐺𝑜𝑛𝑖 is a noun in the genitive.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top left - 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑔𝑜𝑛𝑖 sp. nov.: (a) illustration of SAIAB 11549, female, 45.5 mm standard length (SL), Tshani River estuary, South Africa (31560 39.100 S 29120 26.600 E) (= fig. 240.65 in Smith & Heemstra, 1986); (b–d) uncatalogued fresh and live specimens from (b) the Mzumbe River estuary, South Africa (30360 34.200 S 30320 51.700 E), female, (c) approximately 5 km upstream of the Govuro River estuary, Mozambique (21220 46.600 S 35040 40.100 E), male, and (d) the Backpackers' Channel, Mida Creek, Watamu, Kenya (3210 28.400 S 39590 10.000 E), female. Photographs: (a) by NRF-SAIAB; (b) and (c) by R. Palmer; and (d) by D. Goebbels.
Top middle - Male specimens of 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑠𝑡𝑜𝑚𝑖𝑎𝑠 from Japan. (a) KAUM–I. 161802, 44.0 mm standard length (SL), Mizunari River; (b) KAUM–I. 175230, 28.2 mm SL, Mizunari River; (c) KAUM–I. 213390, 45.9 mm SL, Mizunari River; and (d) KAUM–I. 219428, 29.2 mm SL, Suzuri River.
Top right - Male specimens of 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑎𝑐𝑢𝑡𝑖𝑝𝑒𝑛𝑛𝑖𝑠 s.s.: (a) uncatalogued, from Lantau Island, Hong Kong (22160 07.500 N 113590 52.100 E; photograph by T.C. Yi); (b) KAUM–I. 161804, 38.1 mm standard length (SL), Mizunari River (31150 1500 N 130260 0500 E), Japan; (c) KAUM–I. 173242, 30.8 mm SL, Mizunari River, Japan; and (d) KAUM–I. 144643, 41.1 mm SL, Amami-oshima Island (28110 1900 N 129160 5700 E), Japan.
Bottom - a) The Mlalazi River estuary (28560 38.300 S 31480 52.100 E), KwaZulu-Natal, South Africa, the type locality of 𝑂𝑙𝑖𝑔𝑜𝑙𝑒𝑝𝑖𝑠 𝑔𝑜𝑛𝑖 sp. nov. (b) Salt marshes along the supratidal margins, an important habitat within the estuary. Photos by R. Taylor.

© 2026 the Author(s). Published in the Journal of Fish Biology.

#NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #SaltMarshes #EstuarineFishes #SupratidalMargins #Gobies #Goby #TeamGoby #Oligolepis #EndemicSpecies #Gobioidei #IntegrativeTaxonomy #TeardropGoby #Oxudercidae #Gobioids #Gobionelline

[Fish in the News @FishInTheNews]

#NewSpeciesAlert - 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑧𝑎𝑏𝑜𝑎𝑒 and 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑠𝑐ℎ𝑙𝑖𝑒𝑤𝑒𝑛𝑖, two new species of monogamous gobies (Gobiidae) are described from the Indo-Pacific.

🔒 https://t.co/ZQM3c25a17

"𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑝𝑒𝑟𝑠𝑖𝑐𝑎 is endemic to the northwestern Indian Ocean. 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑝𝑢𝑒𝑙𝑙𝑎𝑟𝑖𝑠 (Tomiyama, 1956), originally described from Japan, and 𝑉. 𝑠𝑡𝑟𝑖𝑔𝑎𝑡𝑎 (Broussonet, 1782), originally described from French Polynesia and long regarded as widely distributed across the Indo-Pacific, are each shown here to comprise two distinct species."

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Taxonomic revision of two Indo-Pacific species of 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 (Teleostei: Gobiidae) reveals two new species from the Indian Ocean

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Zarei, F., Motomura, H. & Chakona, A. (2026) Taxonomic revision of two Indo-Pacific species of 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 (Teleostei: Gobiidae) reveals two new species from the Indian Ocean. Zootaxa, 5807 (2), 351–389. https://t.co/5Sqqm4UuJN

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
The gobiid genus 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 Bleeker, 1856 comprises 17 bottom-dwelling species distributed on shallow coral reefs throughout the tropical and subtropical Indo-Pacific. Twelve species have Indo-Pacific distributions: within the Indian Ocean, six of these species are only found in the eastern part, while the other six occur in both eastern and western regions. 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑝𝑒𝑟𝑠𝑖𝑐𝑎 is endemic to the northwestern Indian Ocean. 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑝𝑢𝑒𝑙𝑙𝑎𝑟𝑖𝑠 (Tomiyama, 1956), originally described from Japan, and 𝑉. 𝑠𝑡𝑟𝑖𝑔𝑎𝑡𝑎 (Broussonet, 1782), originally described from French Polynesia and long regarded as widely distributed across the Indo-Pacific, are each shown here to comprise two distinct species.

Analysis of mitochondrial COI sequences, detailed re-examination of material from ichthyological collections, and comprehensive colour-pattern comparisons support recognition of the Indian Ocean population of 𝑉. 𝑝𝑢𝑒𝑙𝑙𝑎𝑟𝑖𝑠 as a new species for science, described herein as 𝑉. 𝑠𝑐ℎ𝑙𝑖𝑒𝑤𝑒𝑛𝑖 sp. nov.

Similarly, the southwestern Indian Ocean population of 𝑉. 𝑠𝑡𝑟𝑖𝑔𝑎𝑡𝑎 has also been shown to represent a distinct species, herein described as 𝑉. 𝑧𝑎𝑏𝑜𝑎𝑒 sp. nov.

Each of the two new species is readily distinguished from all congeners by a distinctive colour pattern in live specimens, as well as by a combination of meristic characters (second dorsal- and anal-fin rays, scale counts), first dorsal- and caudal-fin morphology, head and body proportions, and residual pigmentation in preserved specimens.

Georeferenced photographic data from iNaturalist and GBIF (703 records of 𝑉. 𝑝𝑢𝑒𝑙𝑙𝑎𝑟𝑖𝑠, 797 of 𝑉. 𝑠𝑡𝑟𝑖𝑔𝑎𝑡𝑎) were also used to characterise colour-pattern variation across the Indo-Pacific.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top - Underwater photograph of 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑧𝑎𝑏𝑜𝑎𝑒 sp. nov. from Saint-Paul, Réunion, 21°04’33.6”S 55°13’11.4”E (photograph by Francois Libert).
Bottom - Underwater photograph of 𝑉𝑎𝑙𝑒𝑛𝑐𝑖𝑒𝑛𝑛𝑒𝑎 𝑠𝑐ℎ𝑙𝑖𝑒𝑤𝑒𝑛𝑖 sp. nov. from Rocky Island, Egypt, Red Sea, 23°33’52.7”N 36°14’53.3”E (photograph by Sylvain Le Bris).

© 2026 the Author(s). Published in the journal Zootaxa.

#NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #Valenciennea #Gobiidae #Goby #Gobies #TeamGoby #IndoPacific #Reef #CoralReef #ReefTank #FishTank #SaltwaterTank #ReefBuilders #MarineAquarium #MarineTank #ReefAquarium #ReefFishes #IntegrativeTaxonomy #MonogamousGobies

[八重山毎日新聞 @yaeyamamainichi]

やいま丸、月末就航へ　18年ぶり石垣～台湾航路復活 https://t.co/d5m92XGAiA

[ユキヤ @yukiyalates]

宮崎の川が熱い！
オオメジロザメ、アサガラハゼなど近年いろんな熱帯性魚類が出現する宮崎県の河川ですが、昨年11月には日本初記録となるウロハゼの仲間が採集されました！
本種は体側の筋模様がはっきりしていることから「タテスジウロハゼ」という和名を提唱してます。

https://t.co/S1lCcn3Ljy

[もも @Favonigobius]

2022年に加計呂麻島から報告したユカタハゼ属の一種を、オコジョハゼHazeus atrispinalisとして新種記載しました！！！！！
https://t.co/F25BYvReGj

[いためつ @Itametsu]

いいものをいただいた

[いためつ @Itametsu]

@Yokoshimadonko 一番楽しい季節

[いためつ @Itametsu]

なぜか東京でひまびととラーメン食べることに

[いためつ @Itametsu]

すごい番組だった

[いためつ @Itametsu]

大勝利の島遠征だった！

[いためつ @Itametsu]

@iha8e やっぱり出てきますよね
最近は砂利から採ることが多いので軟泥の魚という印象が薄れつつあります

[いためつ @Itametsu]

ウチワハゼ、ミナミヒメミミズハゼと一緒に採れたりするので���
軟泥でなくてもいいのか

[いためつ @Itametsu]

@eda_fishrimp 見た目は全く同じなので同種だと思ってます
ただ、礫と軟泥の中間的な環境(泥混じり��砂利)には出てこないのが気になりますね…

[いためつ @Itametsu]

島に来たが、暴風雨でなにもできない

[千葉県立中央博物館 @chiba_chuohaku]

【研究成果発表】全国528地点もの海岸で汲んだ海水から、1220種の魚類の環境DNAの検出に成功！さらに先端的なデータ解析によって、日本沿岸の魚類の分布は、海流が大きく影響していることを明らかにしました。将来の生物分布の予測に役立つことが期待されます。
詳しくは
➡https://t.co/o1O0IxvWI5