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C. Chen @ Jamsteeeec

@squamiferum.bsky.social
670 followers 123 following 117 posts

Deep-sea biologist / Malacologist @JAMSTEC and @Senckenberg. Chemosynthesis-based ecosystems. 海洋生物学者・深海・軟体動物・化学合成生態系。 Website: squamiferum.net See the collection: www.conchology.be/?t=92

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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 01/10/2026
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 01/10/2026
[New Paper] Presents the first record of tubeworm-parasitic copepod Dirivultus spinigulatus from Japan! A range extension from Papua New Guinea. And a new Japanese name, based on a devil fruit from the manga series ONE PIECE! OPEN ACCESS in the journal Species Diversity: doi.org/10.12782/spe...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/09/2026
[New Paper] Names two new species of protobranch bivalves in the genus Pseudoneilonella + moves a known species to this genus. First records of the genus from NW Pacific! From our 2025 JAMSTEC x @oceancensus.bsky.social cruise. Out now @jconch.bsky.social , OPEN ACCESS: doi.org/10.61733/jco...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 31/08/2026
[New Paper] We successfully sequenced ultraconserved elements (UCEs) from old vesicomyid clam shells dated approx. 1100-1700 years ago! This enables phylogenetic reconstruction with genome-wide data from EMPTY SHELLS. @molecology.bsky.social Mol Ecol Resources, OPEN ACCESS: doi.org/10.1111/1755...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 24/08/2026
[New Paper] Presents an AI framework to automatically quantify animal behaviour from videos taken by deep-sea stations! Test model: 5 yrs of data from EMSO-Azores observatory at Lucky Strike, an Atlantic hot vent -- trained model available. Out now @aslo.org L&O: Methods: doi.org/10.1002/lom3...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 18/08/2026
[New Paper] Reveals many ciliates on gills of shrimps from deep-sea hot vents and cold seeps (Alvinocarididae and Thoridae)! Parasitic ciliates are well-known from shallow water shrimps -- they may be widespread in the deep too. Out now @jeukmicro.bsky.social , OPEN ACCESS: doi.org/10.1111/jeu.70
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Dr. Sven N. Nielsen @snnielsen.bsky.social · 17/08/2026
Daily mollusk. Chrysomallon, the scaly-foot snail - the most metal snail of all.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 17/08/2026
[New Paper] Reveals the protoconch (larval shell) of the Scaly-foot Snail! Usually rapidly corroded by acidic vent fluid, we found a tiny 3 mm specimen still retaining it. Large protoconch = more yolk may have helped it spread across ridges. @malacsoc.bsky.social J Moll Stud: doi.org/10.1093/moll...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/08/2026
The two known species are also known from ambient seafloor elsewhere; the new species is only known from one specimen so it is difficult to say if it’s endemic here. There is one snail species from this whale fall shared with cold seeps in Nankai Trough.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/08/2026
PDF: www.researchgate.net/publication/...
researchgate.net
(PDF) Squat lobsters (Decapoda: Anomura: Munidopsidae) from a natural whale fall on Torishima Seamount, Izu-Ogasawara Arc, northwestern Pacific, with the description of a new species
PDF | Whale falls in the deep ocean represent a form of chemosynthetic ecosystem that hosts a suite of specialised fauna. We report three species of... | Find, read and cite all the research you need ...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/08/2026
[New Paper] Reports three squat lobsters in the genus Munidopsis from a natural whale fall at 4000 m deep on Torishima Seamount, Izu-Ogasawara Arc! One of them was new and we named it M. torishimaensis. Out now @crustaceansociety.bsky.social J of Crustacean Biology: doi.org/10.1093/jcbi...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 05/08/2026
Article by @oceancensus.bsky.social highlighting our recent publications! oceancensus.org/new-life-in-...
oceancensus.org
New Life in Japan's Deep Sea: Dr Chong Chen's Discoveries from the Ocean Census–JAMSTEC Expedition
Among the expedition's most recent scientific outcomes are studies led by Dr Chong Chen, Senior Scientist with Tenure at JAMSTEC.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 04/08/2026
Purely comparative. Vesicomyid clams at this depth are capable of producing quite thick shells (they have an excess of energy from symbiosis and can just keep making shell to fight dissolution).
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 04/08/2026
[New Paper] Meet Isorropodon fragilis, a new species of vesicomyid clam discovered from a deep-sea cold seep 4600 m deep in the Nankai Trough, Japan -- during the JAMSTEC x @oceancensus.bsky.social "Shinkai" expedition last year! Out now in Venus, read for FREE: doi.org/10.18941/ven...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 09/07/2026
Read the original IUCN press release here: iucn.org/press-releas...
iucn.org
From desert frog to deep-sea molluscs, remarkable species at risk – IUCN Red List
Gland, Switzerland, 9 July 2026 (IUCN) – Deep-sea mining threatens over half of molluscs reliant on hydrothermal vents, today’s update of The IUCN Red List of Threatened Species™ has revealed. In Aust...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 09/07/2026
The New York Times @nytimes.com “Sea Mining Could Devastate an Enigmatic Group of Creatures, Researchers Warn” www.nytimes.com/2026/07/09/c...
nytimes.com
Sea Mining Could Devastate an Enigmatic Group of Creatures, Researchers Warn
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 09/07/2026
New IUCN Red List update today includes a comprehensive assessment of ALL hydrothermal vent endemic molluscs… and 125/201 (62%) species are THREATENED WITH EXTINCTION from DEEP-SEA MINING! 72 (37%) are Endangered / Critically Endangered. More: www.reuters.com/legal/litiga... @sscmarine.bsky.social
reuters.com
Deep-sea mining threatens molluscs holding promise for science, Red List shows
Over half of mollusc species that cluster around underwater vents and ‌hold promising potential for medicine and technology are at risk of going extinct due to increasing deep-sea mining, the world's ...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 09/07/2026
[New Paper] @zoojlinnsoc.bsky.social names 4 new genera and 5 new species of deep-sea xenophyophores — gigantic single-celled foraminiferal protists that can grow to over 20 cm in size! They are prominent but mysterious inhabitants of abyssal plains. OPEN ACCESS: doi.org/10.1093/zool...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 12/06/2026
Yes! Read our paper in Ecology here: www.researchgate.net/publication/... doi.org/10.1002/ecy....
researchgate.net
(PDF) Laubierinid snails are associates of crinoids and a modern analogue of Paleozoic platyceratids
PDF | On Mar 7, 2025, Chong Chen and others published Laubierinid snails are associates of crinoids and a modern analogue of Paleozoic platyceratids | Find, read and cite all the research you need on ...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 10/06/2026
[New Paper] Describes and names a new species of cleftclam: Thyasira okutanii! It was discovered from deep-sea cold seeps in the Pacific coast of Japan during the JAMSTEC x @oceancensus.bsky.social expedition last year. Out now in The Nautilus, read for FREE: www.researchgate.net/publication/...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 03/06/2026
[New Paper] Our paper reporting the finding of active chimneys and chemosynthesis-based animal community on Quaker Seamount, Mariana Forearc is now published in Marine Biodiversity! Read for FREE: rdcu.be/fl6VE doi.org/10.1007/s125...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 02/06/2026
Article on the Endangered Scaly-foot Snail from Scientific American @scientificamerican.com.web.brid.gy ! www.scientificamerican.com/article/cele...
scientificamerican.com
To celebrate Endangered Species Day, meet the scaly-foot snail, the most metal animal in the world
This snail became the first animal living on deep-sea hydrothermal vents to be added to the IUCN Red List of Threatened Species—it also turns poisonous sulfur into armor
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ESA Journals @esajournals.bsky.social · 26/05/2026
New bizarre deep-sea life history documented in #TheScientificNaturalist 👇
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Meg Daly @megdaly.bsky.social · 26/05/2026
Incredible new snail discovered that eats the tubes of deep sea worms (!!)
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 26/05/2026
We were calling it deep-sea panda on the ship 🤣
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 26/05/2026
[New Paper] in Ecology @esajournals.bsky.social reports a remarkable limpet feeding exclusively on chitinous tubes of deep-sea tubeworms! Chitin may be key energy reserves in the deep. New species in the family Osteopeltidae previously only known from whale fall. OPEN ACCESS: doi.org/10.1002/ecy....
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 25/05/2026
We now know of many vesicomyids that distribute on both sides of the Pacific (ie. US and Japan), actually. Many have been given separate names on the two sides but now we know they are genetically the same species. E.g., Archivesica soyoae = kilmeri.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 25/05/2026
PDF: www.researchgate.net/publication/...
researchgate.net
(PDF) A new species of chemosymbiotic clam (Bivalvia: Vesicomyidae) from the Nankai Trough and Mariana Forearc
PDF | Chemosymbiotic vesicomyid clams in the subfamily Pliocardiinae are a major component of deep-sea chemosynthetic ecosystems, yet their diversity... | Find, read and cite all the research you need...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 25/05/2026
[New Paper] We named a new species of vesicomyid clam, Waisiuconcha takashii, from deep-sea cold seeps in Nankai Trough, Japan and Mariana Forearc! This species is named after the late Japanese malacologist Takashi Okutani (1931-2025). Out now in Zootaxa: doi.org/10.11646/zoo...
doi.org
A new species of chemosymbiotic clam (Bivalvia: Vesicomyidae) from the Nankai Trough and Mariana Forearc | Zootaxa
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 22/05/2026
[New Paper] We assembled the chromosome-level whole genome of the deep-sea tubeworm Lamellibrachia columna! Part of the Darwin Tree of Life project aiming to sequence 70000 eukaryotic genomes. Published @sangerinstitute.bsky.social Wellcome Open Research, OPEN ACCESS: doi.org/10.12688/wel...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/05/2026
[New Paper] We combine multiple isotopic analyses (amino acid+bulk stable isotopes, radiocarbon) to reveal the calamyzine worm Shinkai semilonga at a cold seep feeds directly on the gill of its host vesicomyid clam Archivesica kawamurai! OPEN ACCESS in Marine Ecology: doi.org/10.1111/maec...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 17/04/2026
Just 8 so far, but there’s more to come!
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 17/04/2026
[New Paper] Names two new cleftclam species in the genus Thyasira from serpentine seeps on seamounts of Mariana Forearc! Both probably host chemosymbiotic bacteria. Out now in Molluscan Research, FREE-to-read link for the first 50 readers: www.tandfonline.com/eprint/7FEDH... doi.org/10.1080/1323...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 06/04/2026
[New Paper] @cp-trendsecolevo.bsky.social presents the concept of the SOSA @oceanspecies.bsky.social project, pushing for the acceleration of marine conservation through the synergistic interactions among a "triad": Taxonomy, Red Listing, and Public Engagement! OPEN ACCESS: doi.org/10.1016/j.tr...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 01/04/2026
[New Paper] @royalsocietypublishing.org Biology Letters presents a global barcoding (180 individuals) of the deep-sea snail genus Phymorhynchus from hot vents & cold seeps, revealing few species with very broad and sometimes cosmopolitan distributions! OPEN ACCESS: doi.org/10.1098/rsbl...
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Royal Society Publishing @royalsocietypublishing.org · 18/03/2026
Scientists have uncovered five new species of deep-sea #limpets in the family Lepetodrilidae thriving around deep-sea hydrothermal vents along three underwater mountain chains in the Indian Ocean: royalsocietypublishing.org/rsos/article... @squamiferum.bsky.social #RSOS
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 17/03/2026
The Scaly-foot Snail ENDANGERED from deep-sea mining is now competing in the Uproar Conservation Challenge by Indianapolis Zoo and IUCN! VOTE NOW and help the Scaly-foot Snail win the $10,000 grand prize towards its conservation: www.indianapoliszoo.com/uproar-conse...
indianapoliszoo.com
Uproar Conservation Challenge
Help vote to save endangered species with the Uproar Conservation Challenge. Each round a species moves on to compete for the big prize!
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ESA Journals @esajournals.bsky.social · 13/03/2026
Results of deep-sea surveys surrounding methane seeps—out in "Ecosphere" ⤵️
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 13/03/2026
Thanks!! Watch this space — more coming!
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 13/03/2026
We made a press release!
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Ocean Census @oceancensus.bsky.social · 10/03/2026
NEWS: Scientists from the Ocean Census and JAMSTEC have discovered 38 new species including deep sea polychaetes living in symbiosis with a marine sponge, ribbon worms and squat lobsters. Read more: oceancensus.org/press-releas...
oceancensus.org
Japan’s Deep Ocean Reveals Dozens of New Species from Landmark 2025 Nippon Foundation–Nekton Ocean Census – JAMSTEC Expedition
Following the Ocean Census-JAMSTEC expedition, scientists have confirmed the discovery of 38 new species and identified 28 further potential new species across two of Japan’s most understudied deep-sea regions: the Nankai Trough and the Shichiyo Seamount Chain.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 12/03/2026
[New Paper] @molecology.bsky.social Resources presents "VEHoP", a new bioinformatics pipeline that can infer protein-coding regions from a diverse NGS data types (mixed OK!) and automate phylogenomic inferences! OPEN ACCESS: doi.org/10.1111/1755... @yunlong-li.bsky.social @kmkocot.bsky.social
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 12/03/2026
[New Paper] @molecology.bsky.social Resources presents "VEHoP", a new bioinformatics pipeline that can infer protein-coding regions from a diverse NGS data types (mixed OK!) and automate phylogenomic inferences! OPEN ACCESS: doi.org/10.1111/1755... @yunlong-li.bsky.social @kmkocot.bsky.social
doi.org
Reliable Inference of Phylogenomic Relationship via Assembly‐Based Strategy Accommodating Raw Reads and Proteins
Phylogenomics is a transformative approach in systematics, conservation biology, and biomedical research, enabling the inference of evolutionary relationships by leveraging hundreds to thousands of g...
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Current Biology @currentbiology.bsky.social · 09/03/2026
NEW Issue is out!👇 www.cell.com/issue/S0960-... As the world is being plunged into the abyss, we bring you some abyssal scaly-footed snails from the deep ocean. www.cell.com/current-biol... Plus it's #MolluscMonday
In this issue, Chen et al. present the first population genomics analyses of Indian Ocean hydrothermal vent animals, using eight populations of the scaly-foot snail (Chrysomallon squamiferum) distributed across three mid-ocean ridges. They show an asymmetric south-to-north gene flow driven by deep currents and aided by ghost populations. Their results also identify source-sink dynamics and dispersal barriers essential for conservation planning in the context of upcoming deep-sea mining. The scaly-foot snail is an iconic vent-endemic species famed for the iron-infused sclerites on its foot and functions as a flagship species in deep-sea conservation efforts.
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Current Biology @currentbiology.bsky.social · 09/03/2026
The sea pangolin! Now you tell us...😳
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Danae Thivaiou @paleodanae.bsky.social · 10/03/2026
Chrysomallon squamiferum: what an amazing example of variation in appearance! ‼️Danger: deep ocean drilling can have unpredictable damaging effects on deep-sea biodiversity. 🔸the deep-sea might be far but perturbations occurring there are felt globally!
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 09/03/2026
Our paper is on the COVER of @currentbiology.bsky.social !!!! www.cell.com/current-biol...
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 05/03/2026
[New Paper] @science.org Science Advances reveals mechanisms of chemosymbiosis in the shallow-water clam Thyasira tokunagai, with carbon fixation rates estimated using radiocarbon. Thyasira clams are widespread globally -- a great model to study chemosymbiosis! OPEN ACCESS: doi.org/10.1126/scia...
doi.org
Intricate chemosymbiosis in a widespread shallow-water thyasirid clam
Widespread shallow-water thyasirid clams show metabolic integration with sulfur-oxidizing symbionts.
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C. Chen @ Jamsteeeec @squamiferum.bsky.social · 04/03/2026
[New Paper] is on the COVER of @RSocPublishing Royal Society Open Science! We name 5 new species of hot vent limpets from Indian Ocean -- phylogenetics indicate this family used Indian Ocean as a corridor to disperse from Pacific to Atlantic. OPEN ACCESS: royalsocietypublishing.org/rsos/article...
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Bruce Kiesel @bhkiesel.bsky.social · 26/02/2026
Nice work detailing some of the invertebrates found in cold seeps of the Sea of Japan, including a perfect scientific name for the newly described gastropod.
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