C. Chen @ Jamsteeeec
@squamiferum.bsky.social
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: https://squamiferum.net See the collection: https://www.conchology.be/?t=92
[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...
[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...
@jconch.bsky.social · 4w ago"Two new species of Pseudoneilonella Laghi, 1986 (Bivalvia: Neilonellidae) from the southwestern Japan and a redescription of Neilonella kuroshimaensis Okutani, 2011" has been published in #JournalofConchology #jconch #deepsea #mollusca #conchologicalsociety doi.org/10.61733/jco...
[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...
[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...
[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
Daily mollusk. Chrysomallon, the scaly-foot snail - the most metal snail of all.
C. Chen @ Jamsteeeec@squamiferum.bsky.social · 2mo ago[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...
[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...
[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...
Article by @oceancensus.bsky.social highlighting our recent publications! oceancensus.org/new-life-in-...
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.
oceancensus.org
[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...
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
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 ...
reuters.com
[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...
Yes! Read our paper in Ecology here: www.researchgate.net/publication/... doi.org/10.1002/ecy....
(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 ...
researchgate.net
Chris Mah@echinoblog.bsky.social · 4mo agoSWEET! GFOE has posted a highlight video of those LIVING snails on stalked crinoids! Analogous to platyceratid snails on Paleozoic crinoids! This was described by @squamiferum.bsky.social a year or so ago! #fossilFriday youtu.be/Gsb3ovXDpLM?...
[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/...
[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...
C. Chen @ Jamsteeeec@squamiferum.bsky.social · 9mo ago[New Preprint] 3 days ago, we had a dive at Quaker Seamount -- and today we report the first results! We discovered a serpentinite-hosted seep ecosystem there + the first visible discharge of geofluids. Read for FREE: doi.org/10.64898/202... Dive video: www.youtube.com/watch?v=EMwp...
Article on the Endangered Scaly-foot Snail from Scientific American @scientificamerican.com.web.brid.gy ! www.scientificamerican.com/article/cele...
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
scientificamerican.com
New bizarre deep-sea life history documented in #TheScientificNaturalist 👇
C. Chen @ Jamsteeeec@squamiferum.bsky.social · 4mo ago[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....
Incredible new snail discovered that eats the tubes of deep sea worms (!!)
C. Chen @ Jamsteeeec@squamiferum.bsky.social · 4mo ago[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....
[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....
[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...
A new species of chemosymbiotic clam (Bivalvia: Vesicomyidae) from the Nankai Trough and Mariana Forearc | Zootaxa
doi.org
[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...
[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...
[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...
[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...
[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...
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
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...
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!
indianapoliszoo.com
Results of deep-sea surveys surrounding methane seeps—out in "Ecosphere" ⤵️
C. Chen @ Jamsteeeec@squamiferum.bsky.social · 7mo agoWe made a press release!
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...
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.
oceancensus.org