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Dr Yi-Kai Tea | Ichthyology Curator @austmus | @Sydney_Uni | Systematic ichthyology | Wildlife photographer | ๐Ÿณ๏ธโ€๐ŸŒˆhe/him

Singapore ๐Ÿ‡ธ๐Ÿ‡ฌ | Sydney ๐Ÿ‡ฆ๐Ÿ‡บ
Joined July 2018
Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)Photo by KaiTheFishGuy (@FishGuyKai)
An architectural marvel
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This has surely got to be one of Australiaโ€™s most beautiful butterflies. Hypochrysops halyaetus, the Turquoise, or if youโ€™re in Australia, the Western Jewel.
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KaiTheFishGuy retweeted
Replying to @FishGuyKai
YES!!!!!!! Absolutely dream species to see in the wild
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Had an amazing 8 days on the island of Buru in the Maluku Archipelago! Here are some notable pictures.
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The very lovely Delias caeneus
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The endemic Charaxes madensis!
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KaiTheFishGuy retweeted
A New Deepwater Species of Butterflyfish from Mozambique, Africa, with a Systematic Review of Chaetodontid Relationships by Osteology DOI link: doi.org/10.1643/i2025038 50-day free access link: ichthyologyandherpetology.orโ€ฆ by @FishGuyKai, Blum, @CoralReefFish, Parkinson, @DrScanley
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KaiTheFishGuy retweeted
#NewSpeciesAlert - Cleaning up the cleaner wrasses: ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘“๐‘™๐‘Ž๐‘š๐‘š๐‘ข๐‘™๐‘Ž๐‘ก๐‘ข๐‘  (D) and ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘–๐‘›๐‘œ๐‘๐‘–๐‘›๐‘Ž๐‘ก๐‘ข๐‘  (G, H), two new species of cleaner wrasse (Labridae) are described from the eastern Indian Ocean and western Pacific Ocean, respectively. The authors revise the ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘  and ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ species complexes, and provide a rediagnosis of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘Ÿ๐‘ข๐‘๐‘Ÿ๐‘œ๐‘™๐‘Ž๐‘๐‘–๐‘Ž๐‘ก๐‘ข๐‘ , along with the two new species description, a major work on this enigmatic group of fish. ๐Ÿ”“ lkcnhm.nus.edu.sg/rbz/cleaniโ€ฆ "New ecological and field observations are provided for ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘ , and phylogenetic relationships for the new species, congeneric species of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘ , and related genera of labrichthyine wrasses are explored. ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  is rediagnosed and a key to species is provided." ๐—ฅ๐—ฒ๐˜€๐—ฒ๐—ฎ๐—ฟ๐—ฐ๐—ต ๐—ง๐—ถ๐˜๐—น๐—ฒ Cleaning up the cleaner wrasses: revision of the ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘  and ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ species complexes, with rediagnosis of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘Ÿ๐‘ข๐‘๐‘Ÿ๐‘œ๐‘™๐‘Ž๐‘๐‘–๐‘Ž๐‘ก๐‘ข๐‘  and descriptions of two new species (Teleostei: Labridae) ๐—–๐—ถ๐˜๐—ฎ๐˜๐—ถ๐—ผ๐—ป Yi-Kai Tea, Lauriane Baraf, Younis Menkara, William B. Ludt, Gerald R. Allen, Jean-Paul A. Hobbs & Peter F. Cowman, Cleaning up the cleaner wrasses: revision of the ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘  and ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ species complexes, with rediagnosis of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘Ÿ๐‘ข๐‘๐‘Ÿ๐‘œ๐‘™๐‘Ž๐‘๐‘–๐‘Ž๐‘ก๐‘ข๐‘  and descriptions of two new species (Teleostei: Labridae). Raffles Bulletin of Zoology, Vol 74: 403โ€“443, 18th May 2026. DOI: doi.org/10.26107/RBZ-2026-00โ€ฆ ๐—”๐—ฏ๐˜€๐˜๐—ฟ๐—ฎ๐—ฐ๐˜ The ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘  Randall, 1958 and ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ Fowler & Bean, 1928 species complexes of cleaner wrasses are reviewed. The former comprises three colourful, phylogenetically intractable species confined to tropical coral reefs in the Indo-Pacific, viz., ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘  from the Hawaiian Islands, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘Ÿ๐‘ข๐‘๐‘Ÿ๐‘œ๐‘™๐‘Ž๐‘๐‘–๐‘Ž๐‘ก๐‘ข๐‘  Randall, 1958 from the central and southeastern Pacific, and Labroides pectoralis Randall & Springer, 1975 from the western Pacific. Our phylogenomic analysis of genome-wide ultraconserved elements and mitochondrial DNA resolves four taxa within this complex, with one taxon, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘“๐‘™๐‘Ž๐‘š๐‘š๐‘ข๐‘™๐‘Ž๐‘ก๐‘ข๐‘ , new species, described as a new, cryptic species from the eastern Indian Ocean. ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘“๐‘™๐‘Ž๐‘š๐‘š๐‘ข๐‘™๐‘Ž๐‘ก๐‘ข๐‘ , new species, is described on the basis of eight specimens, the holotype and four paratypes from Christmas Island, and three paratypes from the Cocos (Keeling) Islands. A second species, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘–๐‘›๐‘œ๐‘๐‘–๐‘›๐‘Ž๐‘ก๐‘ข๐‘ , new species, is described on the basis of six specimens, the holotype and two paratypes from Flora Reef, Coral Sea, and one paratype each from the Izu Oceanic Park in Japan, Holmes Reef in the Coral Sea, and Boulari Pass in New Caledonia. ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘–๐‘›๐‘œ๐‘๐‘–๐‘›๐‘Ž๐‘ก๐‘ข๐‘ , new species, appears to be widespread across the western Pacific but is restricted to deep mesophotic coral reefs below 40 m. The new species is highly distinctive and appears to be only distantly related to ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ. The recent synonymy of ๐ฟ๐‘Ž๐‘Ÿ๐‘Ž๐‘๐‘–๐‘๐‘ข๐‘  ๐‘ž๐‘ข๐‘Ž๐‘‘๐‘Ÿ๐‘–๐‘™๐‘–๐‘›๐‘’๐‘Ž๐‘ก๐‘ข๐‘  within ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  is corroborated by morphological and phylogenomic evidence, and the species is reinstated as ๐ฟ๐‘Ž๐‘Ÿ๐‘Ž๐‘๐‘–๐‘๐‘ข๐‘  ๐‘ž๐‘ข๐‘Ž๐‘‘๐‘Ÿ๐‘–๐‘™๐‘–๐‘›๐‘’๐‘Ž๐‘ก๐‘ข๐‘  (Rรผppell, 1835), following the historical combination first established by Gรผnther in the nineteenth century. New ecological and field observations are provided for ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘ , and phylogenetic relationships for the new species, congeneric species of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘ , and related genera of labrichthyine wrasses are explored. ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  is rediagnosed and a key to species is provided. ๐—ฃ๐—ต๐—ผ๐˜๐—ผ ๐—–๐—ฟ๐—ฒ๐—ฑ๐—ถ๐˜ A selection of ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  in life. A, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘โ„Ž๐‘กโ„Ž๐‘–๐‘Ÿ๐‘œ๐‘โ„Ž๐‘Ž๐‘”๐‘ข๐‘ , underwater photograph from Oahu, Hawaii. B, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘Ÿ๐‘ข๐‘๐‘Ÿ๐‘œ๐‘™๐‘Ž๐‘๐‘–๐‘Ž๐‘ก๐‘ข๐‘ , underwater photograph from Moorea, French Polynesia; C, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘’๐‘๐‘ก๐‘œ๐‘Ÿ๐‘Ž๐‘™๐‘–๐‘ , underwater photograph from Koror, Palau. Note attenuated and narrowed anterior body stripe; D, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘“๐‘™๐‘Ž๐‘š๐‘š๐‘ข๐‘™๐‘Ž๐‘ก๐‘ข๐‘ , new species, underwater photograph from Christmas Island; E, F, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘๐‘–๐‘๐‘œ๐‘™๐‘œ๐‘Ÿ, underwater photographs of E, TP and F, IP individuals from Kwajalein Atoll, Marshall Islands, respectively; G, H, ๐ฟ๐‘Ž๐‘๐‘Ÿ๐‘œ๐‘–๐‘‘๐‘’๐‘  ๐‘–๐‘›๐‘œ๐‘๐‘–๐‘›๐‘Ž๐‘ก๐‘ข๐‘ , new species, G, aquarium photograph of freshly collected AMS I.51733-001 holotype from Flora Reef, Coral Sea, Queensland, Australia, and H, underwater photograph of juvenile from Izu Oceanic Park, Jogasaki Coast, Izu Peninsula, Sagami Bay, Japan. Photographs by (A, C) K. Stender, (B) C.A. Clark, (D) J. Sommer-Knudsen, (E) N.K. Michiels, (F) M. Rosenstein, (G) S. Ramones and (H) W. Takase. ยฉ 2026 the Author(s). Published in the journal Raffles Bulletin of Zoology. This paper is released under a Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. #NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #Reef #CoralReef #ReefTank #FishTank #SaltwaterTank #ReefBuilders #MarineAquarium #MarineTank #ReefAquarium #Labridae #Labroides #CleanerWrasse #Wrasse #Australia #IndianOcean #Systematics #Mesophotic #CrypticSpecies #Labrichthyine
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Last month we wrapped up our last of two expeditions to some of the most scenic locations in the Great Barrier Reef and the Coral Sea, with the best expedition team I could have asked for.
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We collected, photographed, and accessioned over 350 specimens from close to 200 species, seven of which are potentially new to science, and 13 are new for Australia.
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This expedition would not have been possible without the generous support of the Minderoo Foundation and the Minderoo OceanOmics Centre, the partnership between the Australian Museum and the California Academy of Sciences!
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